As promised, (though a day late), I'll be going through your designs in more detail. Warning: a lot of text.
I think the snail clusters could work for the Othreleth Woods, (though the Ash Swamp would be another direction to go), but I'm not entirely sold on them being snails or slug-like. Really the shells are the most important part of the design; I'd sort of like to see some more unusual variants as opposed the typical snail shell, such as [url=http://upload.wikimedia.org/wikipedia/commons/2/2b/Slater_rolled_up_for_wiki.jpg]this[/url] or [url=http://upload.wikimedia.org/wikipedia/commons/1/1d/Terebralia_palustris_shell.png]this[/url] or maybe something like
this.
The wasp-like creatures make my think of
Skyrenders (that's an unfinished model), though your design already looks rather different. Maybe try and do something different with the wings? [url=http://tiffanyturrill.files.wordpress.com/2010/10/ornithocheirus_by_lieserl-d2zuxjm.jpg]These[/url] [url=http://www.museum.state.il.us/ismdepts/zoology/collections/lep/roll02/Manduca_Sexta_Moth.jpg]images[/url]
might [url=http://meades.org/moths/moths_06-07-08/white_plume_moth_2.jpg]make[/url] for a good start. The grub also looks very similar to kwama foragers. Another direction would be to go full Skyrender and draw the various stages of a Skyrender life-cycle.
Turning to your crab concepts, I don't think crabs should get too much representation; I find them more interesting if they are rare, and think what species there are should look very distinct. (See the [url=http://images.uesp.net/thumb/9/91/TR3-creature-Molecrab.jpg/180px-TR3-creature-Molecrab.jpg]molecrab[/url], and for that matter the [url=http://www.netartsbaytoday.org/assets/images/Mole-crab1.jpg]mole crab[/url]).
That being said, House Redoran is associated with crabs, so I think a few solid crab designs for Redoran regions wouldn't do any harm.
Of the crabs in your image, the horsecrab rather strikes my fancy. I'd like to see it a little larger, (camel size?); I think it might be interesting for Redoran commanders to use a crab as a sort of biological, elephant-less [url=http://www.hallowellco.com/Howdah-pistol-needed.jpg]Howdah[/url]. A more drab crab native to the Ash Swamp would also be an idea worth exploring, as would a furry crab. (None of those ideas are mutually exclusive).
As for the moose-like creature in the same image, I feel it looks too mammalian; I personally prefer the direction you were going with the elephant-like creature I commented on last time.
As for the undead creatures sheet, most of those creatures only work when placed on flat surfaces, which limits their versatility. I'd also argue that they look more like Daedra or 6th House abominations than typical undead, though that's hardly a bad thing. The turret and the skeleton ghosts are both interesting ideas I'd like to see further developed, though I don't think new undead are very high on TR's priority list for new creatures, so (as is the case with all concept art) I'm not sure if anything would come of it.
On the the image before that, with the elephantine creature: the creature at the top right reminds me of the Alit, and, much like the Alit, it looks very ungainly. That's not really a bad thing, but I think you could try and make the design more compact; basically draw in its upper body until it almost appears to be in the fetal position, so that the center of gravity is above its legs, sort of like [url=http://www.virtuescience.com/el-chupacabras.jpg]this[/url]. (I seriously could not think of a better reference...) I think the creature has potential as a high-level, rather large predator probably found in plains. (Really ashlands are the first thing that springs to mind, such as the Armun ashlands).
The bird-like thing below it looks too birdlike, in my opinion; I'd suggest changing the beak, maybe to something like that of the [url=http://animalia-life.com/data_images/archaeopteryx/archaeopteryx7.jpg]Archaeopteryx[/url] or something unusual like the beak of the pterosaur I linked above. I'd also try something different with the talons; maybe it walks on its [url=http://www.billybear4kids.com/Rozi/KnuckleWalker2.jpg]knuckles[/url], switching over to a more typical run when it's in a hurry? [url=http://public.media.smithsonianmag.com/legacy_blog/Deinonychus-claw-550.jpg]This[/url] sort of thing is probably done to death with fantasy creatures, but the principal of unusual talons might also be worth exploring; maybe something like an [url=http://idahoptv.org/dialogue4kids/images/season12/owls/talon1.gif]owl talon[/url]?
The compact wooly creature would make rather efficient use of the bounding box, but I'm not sure if there's really a niche for it beside the Hoom, which has a similar body structure, and it would also probably look odd when on uneven ground, due to Morrowind's inability to have creatures conform to the terrain.
I like your sort of walrus-like creature, but am not sure if there is space for it beside the Horker. (Those creatures starting with 'h' are really filling all the niches.
)
The anatomy of the four-wing bird looks a little odd; I'm not quite sure how its skeletal structure would look. It also doesn't appear to be especially suited for Morrowind; to me it looks more like something one might find in Valenwood.
As for the eel, I feel as though it isn't really distinctive enough, and am not sure whether we need more underwater creatures.
Turning to your plants in the post before that, I rather like the Khajiit Paw plant, and think that, with minor adjustments, it could work for the Deshaan Plains. (Its green stalk is the main problem I have with it. Not sure whether it should be beige, or some sort of pale, opaque blue, or maybe something darker like [url=http://www.hangerproject.com/media/catalog/product/cache/1/image/1500x/040ec09b1e35df139433887a97daa66f/c/d/cdm-0803220-_blesbok-horn_desk-cigar-cutter-1.jpg]this horn[/url].
The other plants look as though they're intended for the Argon Jungle, but I'm rather hesitant to delve into that region, as it is one of the least established regions; I'd personally like to go more in the direction of a swamp much like [url=http://upload.wikimedia.org/wikipedia/commons/3/38/Honey_Island_Swamp,_Louisiana_%28paulmannix%29.jpg]this image[/url], but naturally darker, more foreboding, and very dangerous, but it's quite possible we will make it a more proper jungle, or do something else entirely.
As for the other image in the same post, that creature again looks very much like it belongs to the 6th House or is Daedric, in this case specifically a servant of Hermaeus Mora. We unfortunately have no use for the latter, and I doubt we'd add new 6th House creatures, as the 6th House would not have any extensive presence on the mainland.
Of the images in your first post:
-I like the nix-hound subtypes. The top one works well for ashlands, (as I imagine was intended), while that bottom one would work well for a plain such as the Deshaan, though I actually think it might work better in Telvannis, whenever we return to it, roving amongst the bug herds.
-I think there's a bit of dialogue in Morrowind establishing that only Dunmer become corprus beasts, but I could be very wrong. As with 6th House creatures, though, I'm not sure if TR would add corprus variants, as much potential as there is for variants.
-I like the idea of a Dwemer prosthetic; it makes me think of Gottfried von Berlichingen's [url=http://www.collectorsweekly.com/articles/wp-content/uploads/2012/10/iron-hand.jpg]iron hand[/url]. I'm not sure if there would be a use for it, though; while it could be a unique item, it's a prosthetic rather than a gauntlet, so the player couldn't really wear it. Unless there is a really good reason for it, such as an important questline or something, I think modelling such a complex unique item would be more trouble than it is worth.
It would make for a very interesting schematic, though.
-I like your mixed animals, but don't think any of them really stand out enough from other creatures and designs. In particular, while I like the rat variant, rats work as an analogy to outsiders in
Morrowind, so I do not think we would want an endemic variant of it.
-as far as the mandrake is concerned, I personally imagine that sort of thing to be native to High Rock.
-I like your siltstrider relative, but think that, in this case, too, there isn't really a large enough niche for it.
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