6, CHRYSEMYS. 69 
6, CHRYSEMYS,. 
Emys, part., Dum. Zool. Anal. p. 76 (1806); Dum. § Bibr. ii, 
p. 282 (1835) ; Gray, Cat. Tort. p. 14 (1844), and Cat. Sh. Rept. 
i. p. 19 (1855). 
Clemmys, part., Wagler, Syst. Amph. p. 156 (1830) ; Strauch, Chelon. 
Stud. p. 28 (1862). 
Terrapene (non Merr.), part., Bonap. Osserv. s. sec. Ed. d. R.A. 
p. 153 (1830). 
Chrysemys, Gray, Cat. Tort. p. 27, and Sh. Rept. 1. p. 32; Agassiz, 
Contr. N. H. U.S. 1. p. 488 (1857). 
Pseudemys, Gray, Cat. Sh. Rept. i. p. 383, and Suppl. i. p. 45 (1870). 
Ptychemys, Agassiz, J. e. p. 451. 
Trachemys, Agassiz, l. e. p. 454; Gray, Suppl. p. 47. 
Nectemys, Agassiz, op. cit. 11. p. 642. 
Deirochelys, Agass. J. c. p. 441; Gray, Suppl. p. 59. 
Callichelys, Gray, Ann. § Mag. N. #H. (8) xii. p. 181 (1865), and 
Suppl. Cat. Sh. Rept. p. 48. 
Redamia, Gray, Suppl. p. 35. 
Skull of Chrysemys seripta. (From Gray, P. Z. 8. 1869.) 
Neural plates hexagonal, short-sided in front. Plastron exten- 
sively united to the carapace by suture, with short or moderately 
a2 
