6. CHRYSEMYS. 83 
snout pointed and strongly projecting, the nostrils pierced below the 
end of the snout ; median ridge of upper alveolar surface stronger 
and denticulated. Carapace brown; an oval dark spot, surrounded 
by a light ring in the postero-proximal part of each costal shield, 
close to the vertebral; plastron marbled or blotched with dark 
brown; a broad dark brown band across the bridge. The longi- 
tudinal bands on the head less numerous and less distinct. 
West coast of Central America. 
a. 3, Shell, andsoft Tapana, Tehuantepec. F. Sumichrast [C.]. O.- 
parts in spirit. Salvin & F. D. God- 
man, Esgqs. [P.]. 
6, e. Ad., shells, Tapana, Tehuantepec. F. Sumichrast [C.]. O. 
Salvin & F. D. God- 
man, Esqs. [P. ]. 
d,e. 9, stffd. Sao Mateo, Tehuantepec. F. Sumichrast | C. |. 
SJ. S, stftd. Mexico. 
10. Chrysemys concinna. 
Emys reticularia (non Daud.), Say, Journ, Ae. Philad. iy. p. 204 
1825). 
Testudo iStehe: Leconte, Ann. Lyc. N. ¥. iii. p. 100 (1830), 
concinna, Leconte, 1. ec. p. 106. 
Terrapene floridana, Bonap. Osserv. s. sec. Ed. d. R.A. p. 154 (1880). 
-— concinna, Bonap. t. ce. p. 156. 
Emys annulifera, Gray, Syn. Rept. p. 82 (1831), and Cat. Tort. 
p- 28 (1844), and Sh. Rept. i. p. 27 (1855). 
floridana, Dum. § Libr. ui. p. 285 (1835); Holbr. N. Am. 
Herp. i. p. 65, pl. viii. (1842); Gray, Cat. Tort. p. 26, and Sh. 
Rept. i. p. 27. 
concinna, Dum. § bibr. ii. p. 289; Holbr. 1. c. p. 119, pl. xix.; 
Gray, Cat. Tort. p. 25. 
Pseudemys concinna, Gray, Cat. Sh. Rept. i. p. 54, and Suppl. p. 47 
1870). 
eee concinna, Agassiz, Contr. N. H. U. S. 1. p. 482, pl. i. 
fig. 13, & pl. il. figs. 4-6 (1857). 
Clemmys concinna, Strauch, Chelon. Stud. p. 52 (1862), and Verth. 
Schildkr. p. 76 (1865). 
floridana, Strauch, Chelon. Stud. p. 32. 
Emys orthonyx, Wied, N. Acta Ac. Leop.-Carol. xxxii. i. p. 23, 
pl. iii. (1865). 
Trachemys annulifera, Gray, Hund-List Sh. Rept. p. 47 (1873). 
Carapace moderately depressed, unicarinate in the young, longi- 
tudinally rugose in the adult; nuchal narrow ; first vertebral with 
sinuous lateral borders, not broader in front than behind, and 
frequently narrower ; second and third vertebrals as long as broad, 
ora little longer than broad, in the adult, narrower than the costals ; 
posterior marginals not or but very slightly notched. Hind lobe of 
plastron notched, its width not one third that of the carapace ; its 
length about equals the width of the bridge; the longest median 
suture is that between the abdominal shields, the shortest that be- 
tween the humerals ; inguinal and axillary large. Head moderate ; 
snout very short, not projecting ; upper jaw not distinctly notched 
i 
