12. Emys. La 
12. EMYS. 
Emys, part., Dumér. Zool. Anal. p. 76 (1806) ; Merrem, Tent. p. 22 
0); Wagler, Syst. Amph. p. 138 (1830) ; Strauch, Chelon. Stud. 
p- 27 (1862). 
Emys, Fleming, Phil. Zool. ii. p. 270 (1822); Bonap. Osserv. 8. sec. 
Eid. d. R. A. p. 164 (1850); Agassiz, Contr. Nat. Hist. U.S. i. 
p- 441 (1857). 
Terrapene, part., Bell, Zool. Journ. ii. p. 308 (1825). 
Cistudo, part., Gray, Syn. Rept. p. 17 (1831); Dum. §& Bibr. i. 
p. 207 (1835) ; Gray, Cat. Tort. p. 29 (1844). 
Lutremys, Gray, Cat. Tort. p. 31, and Cat. Sh. Rept. i. p. 40 (1855), 
and Suppl. p. 22 (1870). 
Emydoidea, Gray, Suppl. p. 19. 
Neural plates hexagonal, short-sided in front. Plastron united 
to carapace by ligament, and more or less distinctly divided, in the 
adult, into two lobes movable upon a ligamentous hinge between 
a tee a eer! 
g pervs PAZ IARI SO 
Nol 
Ze 
ae ces HIDE LALLOE SEDI TED 
appr iH questa A EG, 
Shell of Lmys orbicularis. 
the hyo- and hyposternals, both of which bones contribute to the 
formation of the bridge; entoplastron intersected by the humero- 
