PLATE 15 
All specimens coated and magnified x 31.5 
Fics. 1-3, 8. Mestognathus bipluti Higgins 
ta. Outer aboral lateral view of specimen X 246. 1b. Outer lateral oral view of specimen 
X 246. tc. Inner lateral oral view of specimen X 246. 2a. Aboral view of specimen X 248. 
2b. Outer lateral view of specimen X 248. 2c. Inner lateral view of specimen X 248. 3a. 
Outer aboral lateral view of specimen X 247. 3b. Outer lateral oral view of specimen X 247. 
3c. Inner lateral oral view of specimen X 247. 8a. Aboral view of specimen X 249. 8b. Inner 
oral view of specimen X 249. 
Fics. 4-6. Mestognathus neddensis sp. nov. 
4a. Aboral view of paratype X 251. 4b. Inner lateral oral view of paratype X 251. 4c. Outer 
lateral view of paratype X 251. 5a. Outer aboral lateral view of paratype X 252. 5b. Inner 
lateral oral view of paratype X 252. 5c. Outer lateral oral view of paratype X 252. 6a. Aboral 
view of holotype X 250. 6b. Inner lateral oral view of holotype X 250. 6c. Outer lateral 
view of holotype X 250. 
Fic. 7. Mestognathus beckmanni Bischoff 
a. Aboral view of specimen X 245. b. Oral view of specimen X 245. c. Outer lateral view 
of specimen X 245. d. Inner lateral view of specimen X 245. 
Fic. 9. Polygnathus sp. 
a. Oral view of specimen X 531. b. Inner lateral view of specimen X 531. c. Aboral view 
of specimen X 531. 
