662 E. B. BRA X SOX 



Figs. 17-21, 25-27. — Crassidonta stuckenbergi n. gen. and sp.: Figs. 

 17, 18, 21, and 26, top views of four teeth; Fig. 19, side view; Fig. 20, end 

 view; Figs. 25 and 27, bottom views (No. 703). 



Figs. 22-24. — Stuckenberg's figures of a specimen of Crassidonta stucken- 

 bergi from the Moscowian, for comparison with the specimens from the Embar. 



PLATE II 



Figs. 1-4. — Janassa unguiformis St. John and Wort hen: Fig. 1, outer 

 coronal face of tooth with part of inserted end missing; Fig. 2, lateral view of 

 the same specimen; found in the Embar, Big Popo Agie Canyon, Wyoming 

 (No. 706); Fig. 3, outer coronal face of almost perfect tooth; Fig. 4, lateral 

 aspect of the same specimen, Upper Pennsylvanian of Missouri (No. 421). 

 (All figures show about natural size.) 



Figs. 5 and 6. — Janassa angularis Branson: Fig. 5, outer coronal view of 

 specimen with inserted end missing; Fig. 6, lateral aspect of the same specimen; 

 found in the Embar, Bull Lake Creek, Wyoming (No. 713). (Figures show 

 about natural size.) 



Figs. 7-19. — Janassa unguicula Eastman: Figs. 7, 9, 10, 12, 14, 17, 

 outer coronal views of several teeth showing variations (inserted end of all 

 specimens missing); Fig. 8, inner coronal view of the same tooth as Fig. 9; 

 Fig. 11, lateral view of the same tooth as Fig. 12; Fig. 13, lateral view of the 

 same tooth as Fig. 14; 9/10 natural size, found in the Embar, Bull Lake 

 Creek and Big Popo Agie Canyon, Wyoming (Nos. 708 and 720); Figs. iS 

 and 19, lateral and outer coronal views of a tooth from Carlinville, Illinois, 

 Upper Pennsylvanian, 16/13 natural size (No. 7056 of the Illinois State 

 Museum). 



Fig. 20. — Helodus rugosus Newberry and Worthen : side view of the only 

 specimen collected from the Embar; twice natural size; the peculiar surface 

 markings may be made out in the photograph. 



Figs. 2 1 and 21a. — Campodus sp ?: top and end vi ews of the only specimen 

 collected from the Embar. 



Fig. 22. — Ddtodits mercurii: end view of an Embar specimen of mandib- 

 ular tooth for comparison with Fig. 16, of the type; X7/8. 



Figs. 23 and 24. — Chdodus occidentalis Leidy: bottom and inner views of 

 an imperfect tooth; summit of cones restored after other specimens; X7/8; 

 found in the Embar, Big Popo Agie Canyon, Wyoming (No. 705). 



Fig. 25. — Ctcnacanthus amblyxiphias Cope; side view of imperfect spine 

 from Bull Lake Creek, Wyoming, 38 feet from the bottom of the Embar; 

 X10/9 (No. 718). 



Fig. 26. — Denticles probably coming from the spine of an Elasmobranch; 

 X10/9; found in the Big Popo Agie Canyon. Wyoming, Embar (No. 7°?)- 



Figs. 27 and 2S. — Ddtodits mercurii Newberry; side and top views of an 

 almost perfect right median mandibular tooth; X8/9; found in the Embar, 

 Bull Lake Creek, Wyoming (No. 716). 



