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TESTU DINID A, 
1. Chrysemys picta. 
Testudo picta, Schnewd. Schildkr. p. 548 (1783) ; Schoepff, Testud. 
p. 20, pl. iv. (1792); Daud. Rept. ii. p. 164 (1802); Leconte, 
Ann. Lyc. N. ¥. iit. p. 115 (1850). 
cinerea, Schneid. Schr. Ges. Naturf. Fr. x. p. 268 (1792). 
Emys picta, Schweigg. Prodr. p. 37 (1814); Say, Journ. Ae. Philad. 
iv. p. 211 (1825); Dum. § Bibr. ii. p. 297 (1835) ; Holbr. N. Am. 
Herp. i. p. 75, pl. x. (1842); Dekay, Faun. N. Y., Rept. p. 12, 
pl. v. fig. 10 (1842); Gray, Cat. Tort. p. 27 (1844); Wied, N. 
Acta Ac. Leop.-Carol. xxxii. 1. p. 12 (1865). 
Terrapene picta, Bonap. Osserv. s. sec, Ed. d. Rk. A, p. 158 (1880). 
Chrysemys picta, Gray, Cat. Sh. Rept. i. p. 32 (1855); Agassiz, 
Contr. N. H. U.S. 1. p. 488, pl. i. figs. 1-6, & pl. 11. fig. 4 (1857) ; 
Gray, Suppl. Cat. Sh. Rept. 1. p. 89 (1870), and Ann. § Mag. N. 
H, (4) xi. p. 146 (1878). 
Clemmys picta, Strauch, Chelon. Stud. p. 129 (1862), and Verth. 
Schildkr. p. 83 (1865). 
Carapace much depressed, quite smooth, without trace of a keel, 
even in the young; nuchal and anterior marginals elongate, with 
denticulated edge in the adult ; first vertebral shield much narrower, 
and usually shorter, than second, not or but little broader in front 
than behind; vertebrals 2 to 4 broader than long (second sometimes 
as long as broad), as broad as or broader than the costals, the 
antero-lateral borders much shorter than the postero-laterals ; 
posterior margin of carapace not serrated. Plastron very large, as 
large as the opening of the shell; front and hind lobes truncate, 
and sometimes finely denticulated at the end; the width of the 
hind lobe is more than two thirds the width of the carapace in the 
adult, and its length equals the width of the bridge; the largest 
shields are the abdominals, which are about twice as long as the 
pectorals; gulars and anals subequal in length; the shortest 
median suture is that between the humerals ; inguinal and axillary 
large, latter largest. Head moderate; snout short, feebly pro- 
jecting ; upper jaw with a small median notch and a small cusp on 
each side, the edge not or but very slightly denticulated; alveolar 
surfaces moderately broad, with feeble median ridge: the width of 
the mandible at the symphysis is much less than the horizontal 
diameter of the eye. Digits webbed to the claws, which are very 
long in the adult, especially males *. Tail one half to two thirds 
the length of the shell in the young, one third to two fifths in the 
males, less than one third in the females. Carapace dark brownish 
olive or blackish, with a yellow vertebral line and a broad yellow 
band on the anterior line of the vertebral and costal shields (exclusive 
of the first); this yellow border forms a continuous, nearly straight 
band across the carapace between marginals 7 ; marginals red, with 
black concentric or crescentic markings ; plastron yellow, usually 
uniform, sometimes with a small symmetrical blackish marking on the 
* Males may be distinguished by the position of the anus, which opens 
beyond the border of the carapace. 
