EXPLANATION OF PLATES. 



(Pages 389 to 411.) 



PLATE LXXIII. — Skull of Desmatoehelys loivii Williston, from above, pm, 

 premaxillary; ma, maxillary; pfr, prefrontal; n, nasal; pa, parietal; fr, 

 frontal ; pof, postfrontal. 



PLATE LXXIV. — Skull of Desmatoehelys loivii from below, ima, mandible; 

 ch, choana; ma, maxillary; plf, palatine foramen; pal, palatine; pt, 

 pterygoid. 



PLATE LXXV. — Right humerus of Desmatoehelys loivii. 



PLATE LXXVI. — Fig. 1, right marginal and adjacent plastral bone of Desma- 

 toehelys loivii; fig. 2, pygal and contiguous right marginal of same; figs. 

 8, a, b, c, metacarpals of same ; 9, 10, 11, undetermined bones of front limb. 



PLATE LXXVII. — Desmatoehelys lowii. Fig. 1, coracoid ; fig. 2, radius and 

 ulna, a, (?); fig. 3, scapula-proscapula. 



PLATE LXXVIII. — Desmatoehelys loivii. Fig. 1, right pelvic bones, inner 

 side: 1, ilium, la, ischium, lb, pubis; fig. 2, femur; fig. 3, carpal; fig. 4, 

 caudal vertebra. 



PLATE LXXIX. — Skull of Toxochelys latiremis Cope, palatal view: pmx, 

 premaxillary; mx, maxillary; p, palatine; pt, pterygoid; bo, basioccipital ; 

 exo, exoccipital ; so, supraoccipit'al ; q, quadrate ; ju, jugal. 



PLATE LXXX. — Toxochelys. Fig. 1, scapula, right side; fig. 2, right cora- 

 coid; fig. 3, left hyoplastron ; fig. 4, left hypoplastron ; fig. 5, left xiphi- 

 plastron ; fig. 6, coracoid of a small specimen ; fig. 7, humerus of same ; 

 fig. 8, femur of same ; fig. 9, ilium of same. Figs. 1, 2, T. latiremis ; others, 

 T. serrifer. 



PLATE LXXXI. — Toxochelys latiremis. Figs. 1, 2, femora; fig. 3, upper end 

 of same ; fig. 4, lower jaw, from above ; fig. 5, inner side of lower jaw ; figs. 

 6, 7, upper ends of humeri; fig. 8, right ilium; fig. 9, outline of pelvis of 

 Chelonia; figs. 10 to 13, carpal bones. 



PLATE LXXXII.— Fig. 1, fourth or fifth finger of Toxochelys latiremis; fig. 

 2, first finger of same ; fig. 3, nuchal plate of same ; fig. 4, under view of 

 anterior part of skull of Toxochelys serrifer Cope ; fig. 5, the same, upper 

 view ; fig. 6, ischium of Toxochelys latiremis. 



PLATE LXXXIII. — Fig. 1, posterior portion of carapace of Toxochelys serri- 

 fer; figs. 2, 3, 4, cervical vertebrae of T. latiremis. 



PLATE LXXXIV. — Fig. 1, upper view of skull of Toxochelys brachyrhinus 

 Case, reduced; fig. 2, the same, restored, natural size. 



(387) 



