PLATE 3 
All specimens coated and magnified x 31.5 
Fics. 1-4. Spathognathodus crassidentatus (Branson & Mehl) 
ta. Inner lateral view of specimen X 463. 1b. Aboral view of specimen X 463. 2a. Inner 
lateral view of specimen X 460. 2b. Oral view of specimen X 460. 3a. Inner lateral view of 
specimen X 461. 3b. Aboral view of specimen X 461. 4a. Inner lateral view of specimen 
X 462. 4b. Aboral view of specimen X 462. 
Fics. 5-8. Spathognathodus anteposicornis Scott 
5a. Inner lateral view of specimen X 540. 5b. Oral view of specimen X 540. 6a. Inner 
lateral view of specimen X 543. 6b. Aboral view of specimen X 543. 7a. Inner lateral view 
of specimen X 541. 7b. Aboral view of specimen X 541. 8a. Inner lateral view of specimen 
X 542. 8b. Oral view of specimen X 542. 
Fics. 9-12. Spathognathodus tridentatus (E. R. Branson) 
ga. Inner lateral view of specimen X 395. 9b. Oral view of specimen X 395. 9c. Aboral view 
of specimen X 395. 10a. Inner lateral view of specimen X 396. 1o0b. Oral view of specimen 
X 396. toc. Aboral view of specimen X 396. 11a. Inner lateral view of specimen X 397. 
1b. Oral view of specimen X 397. 11c. Aboral view of specimen X 397. 12a. Inner lateral 
view of specimen X 394. 12b. Oral view of specimen X 394. 12c. Aboral view of specimen 
X 394. 
Fics. 13-15. Spathognathodus costatus costatus (E. R. Branson) 
13a. Inner lateral view of specimen X 456. 13b. Aboral view of specimen X 456. 14a. Inner 
lateral view of specimen X 166. 14b. Oral view of specimen X 166. 15a. Inner lateral view 
of specimen X 455. 15b. Oral view of specimen X 455. 
Fics. 16-18. Spathognathodus costatus sulciferus (Branson & Mehl) 
16a. Inner lateral view of specimen X 459. 16b. Oral view of specimen X 459. 17a. Inner 
lateral view of specimen X 458. 17b. Aboral view of specimen X 458. 17c. Oral view of 
specimen X 458. 18a. Aboral view of specimen X 457. 18b. Inner lateral view of specimen 
X 457. 18c. Oral view of specimen X 457. 
