PLATE 31 
All specimens coated and magnified x 31.5 
Fic. 1. Hindeodella undata Branson & Mehl 
Lateral view of specimen X 185. 
Fic. 2. Apatognathus sp. 
Inner lateral view of specimen X 318. 
Fic. 3. Hibbardella (Hassognathus) ? sp. 
Lateral view of specimen X 310. 
Fic. 4, 16. Ligonodina tenuis Branson & Mehl 
4. Lateral view of specimen X 320. 16. Lateral view of specimen X 321. 
Fics. 5, 11. Magnilaterella spp. 
5. Inner lateral view of specimen X 322. 11. Aboral inner lateral view of specimen X 323. 
Fic. 6. Hibbardella (Hibbardella) abnormis Branson & Mehl 
Lateral view of specimen X 508. 
Fic. 7, 10. Hindeodus alatoides (Rexroad & Burton) 
7. Lateral view of specimen X 193. 10. Lateral view of specimen X 192. 
Fic. 8. Hindeodus imperfectus (Rexroad) 
Lateral view of specimen X 194. 
Fic. 9. Ligonodina tulensis (Pander) 
Lateral view of specimen X 328. 
Fic. 12. Spathognathodus scitulus subsp. nov. 
a. Oral view of specimen X 390. b. Aboral view of specimen X 390. c. Lateral view of 
specimen X 390. 
Fic. 13. Cavusgnathus unicornis Youngquist & Miller 
a. Aboral view of specimen X 329. b. Lateral view of specimen X 329. 
Fic. 14. Lonchodina transitans Collinson & Druce 
- Lateral view of specimen X 234. 
Fic. 15. Kladognathus mehli (Rexroad) 
Inner lateral view of specimen X 524. 
Fic. 17. Hindeodella brevis Branson & Mehl 
Lateral view of specimen X 514. 
Fics. 18, 19. Hindeodella cooperi (Elias) 
18. Lateral view of specimen X 158. 19. Lateral view of specimen X 159. 
Fic. 20. Siphonodella sp. 
Oral view of specimen X 539. 
Fic. 21. Polygnathus sp. 
a. Oral view of specimen X 130. b. Aboral view of specimen X 130. 
Fic. 22. Apatognathus sp. nov. A. 
a. Inner lateral view of specimen X 43. b. Outer lateral view of specimen X 43. 
Fic. 23. Gnathodus girtyi turritus Collinson & Druce 
a. Lateral view of specimen X 116. b. Aboral view of specimen X 116. c. Oral view of 
specimen X 116. 
Fic. 24. Geniculatus sp. 
Lateral view of specimen X 327. 
Fics. 25-26. Magnilaterella robusta Rexroad & Collinson 
25. Inner lateral view of juvenile specimen X 528. 26. Inner lateral view of specimen X 529. 
Fic. 27. Apatognathus porcatus (Hinde) 
Inner lateral view of specimen X 220. 
a\SH MUS 
SS ae 
> QD 
3 MAR 1969 
