N0.1192. TRENTON FAUNA OF BAFFIN LAND— SCHUCHEBT. 177 



Modiolodon areticiis, p. 161. 



18, 19. Views of the cast of the interior. 



Allodesma (?) species undetermined. 



20-22. Three views of the only specimen. This species is for the present not 

 described. 



Whitella arcticus, p. 163. 



23-25. Three views of the type specimen. 



Vanuxemia iaffinensis, p. 163. 



26-28. Three views of the type specimen. 



29, 30. Two views of a large specimen which probably is a distinct form. 



Oyrtodonta sillimanensis, p. 162. 



31-33. Views of the type specimens, 



Cyrtodonta (f) gibhera Ulrich, var., p. 162. 



34-36. View of the only example. 



Plate XIV. 



Oncoceras tumidum, p. 172. 

 Fig. 1. Ventral side. 



2. Side view. 



3. Sectional view of the larger end. 



Oncoceras arcticum, p. 172, 



4. View of the dorsum. 



5. Side view. 



6. Sectional view, with the position of the sipho. 



7. Ventral side. 



Cyrtoceras cornnhim, p. 170. 



8. Side view, showing the radiating furrows of the inner side of the shell. 



9. Ventral view. 



10. Outline of the shell transversely. 



Cyrtoceras iaffinensis, p. 171. 



11. Side view. 



12. Ventral view. 



13. End view with about half the length of the shell drawn in, 

 Proc. N. M. vol. xxii 12 



