CINOSTERNID-E. Bie 
1. Claudius angustatus. 
Claudius angustatus, Cope, Proc. He Philad. 1865, p. 187, and Proc. 
Am. Philos. Soc, xi. 1869, pl. ix.; Bocourt, l.c. p. 20, pl. iv.; Cope, 
Proc. Ac. Philad. 1872, p. 28; "Giinth. Biol. C.-Am., Rept. p. 12 
(1885). 
megacephalus, Bocourt, .4nn. Se. Nat. (5) x. p. 122 (1868) ; 
Cope, Proc, Ac. Philad. 1872, p. 27. 
Plastron rhomboidal, anterior and posterior lobes angular ; a very 
small gular may be present; abdominals twice as broad as long ; 
anals distinct or united. No warts on the neck. 
Length of carapace 105 millim. 
Mexico. 
Fam. 4. CINOSTERNIDZ. 
Emydide, part., Gray, Ann. Phil. (2) x. 1825. 
Steganopodes, part., Wagler, Syst. Amph. 1830. 
Emydee, part., Gray, Syn. Rept. 1851. 
Elodites Cryptodéres, part., Duméril & Bibron, Erp. Gén. ii. 1835. 
Emydide, part., Gray, Cat. Tort. 1844, and Sh. Rept. i. 1855, 
Cinosternidee, Agassiz, Contr. N. H. U.S. i. 1857, 
Chersemyda, part., Strauch, Chelon. Stud. 1862. 
Chelydrade, part., Gray, Suppl. Cat. Sh. Rept. i. 1870. 
Cinosternidee, Cope, Proc, Am. Philos, Soc, xx. 1882, p. 144. 
Nuchal plate produced into costiform processes, underlying the 
marginals. Plastral bones eight, the entoplastron being absent. 
Shell covered with epidermal shields. Caudal vertebre proccelous. 
Neck completely retractile within the shell. Temporal region not 
roofed over; no parieto-squamosal arch. Digits moderately elon- 
gate ; phalanges with condyles ; claws four or “five, 
1. CINOSTERNUM. 
Terrapene, part., Merr. Tent. p. 27 (1820). 
Kinosternon, Spi, Spec. Nov. Testud. p. 17 (1824); Gray, Cat. Tort. 
p. 32 (1844), and Cat. Sh, Rept. i. p. 43 (1855), 
Kinosternont part., Bell, Zool. Journ. ii. p. 802 (1825), 
Sternothzerus, part., Beil, lc. p. 505. 
Cinosternon, Wag gler, Syst. Amph. p. 187 (1830); Dum. §& Bibr. ii. 
p- 361 (1835) ; Strauch: Chelon. Stud. p. 39 (1862); Bocourt, 
Miss. Sc. Mex., Rept. p. 23 (1870). 
Uronyx, Rajin. Atlant. Journ. p. 64 (1852). 
Diclida, part., Rafin. 1. e. 
Monoclida, Rafin., 1. ce. 
Staurotypus, part., Dum. § BLL ii. p. 354, 
Swanka, Gray, Cat, Tort, p. 32, and Suppl. Cat. Sh. Rept. i. p. 67 
1870). 
Fee ah Leconte, Proc, Ac. Philad. 1854, p. 180. 
Aromochelys, Gray, Cat. Sh. Rept. i. p. 46; Strauch, lc. p. 38. 
Goniochelys, Agassiz, Contr. N. H. U, 8.1. p, 428 (1857). 
