drawings

[thunderlizard?]

Hello everyone.  I'm new to the forum.  I thought I'd submit some of my drawings.  I try to be as anatomically correct as my skill and laziness allow.  Please leave feedback.  I was particularly curious about the triceratops and rex. 
-I've been seeing a lot of ceratopsians with spikes or spines, is this a recent discovery?
-For rex, is the dewclaw on the inside or outside (is that medial or lateral?) of the foot.
-What about feathers? Is there any evidence of crests on theropods, was there a pattern to the feathering or just all over?
- Do all therpods have dewclaws?
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[Gwangi]

Not bad, I especially like the Spinosaurus head in the second drawing you posted. I notice some proportional/anatomical issues on some of them though. Like that last raptor you posted (which should be fully feathered like a bird) the pubis bone should be between the legs, not at the base of the tail. I suggest referring to some skeletal drawings as reference. Check out Scott Hartmans page for those. http://www.skeletaldrawing.com/

Here is an example. Notice where the pubis is in relation to the legs and tail. This is Deinonychus.

[DinoToyForum]

Nice work. To answer one of your questions the 'dewclaw', actually the hallux, is on the inside. It is the first digit of the foot, homologous to our big toe 

[thunderlizard?]

Cool, I thought it was inside.  Thanks for that website!