6. CHRYSEMYS. 77 
suture is that between the abdominal shields, the shortest that 
between the humerals ; axillary and inguinal shields present. Head 
remarkably small and narrow, snout a little pointed ; upper jaw 
slightly emarginate mesially. Digits very broadly webbed, claws 
extremely long in the male. Tail about one fourth the length of 
the shell in the male. Carapace olive-brown, tinged with green, 
subdivided by broad yellowish lines into spaces of various shapes 
and sizes, each space being occupied by narrower concentric lines of 
the same colour; plastron yellow, with a dusky blotch at the ex- 
ternal border of the pectoral and abdominal shields. Head, neck, 
and limbs dark brown, with yellow lines and bands. 
Length of shell 30 centim. 
Tennessee and Georgia. 
6. Chrysemys scripta. 
Testudo scripta, Schoepff, Testud. p. 16, pl. ii. fig. 3 (1792); Daud. 
Rept. ii. p. 140 (1802). 
serrata, Daud. 1. c. p. 148, pl. xxi. figs. 1,2; Leconte, Ann. 
Lye. N. Y. iii. p. 105 (1830), 
Emys scripta, Schweegg. Prodr. p. 28 (1814). 
serrata, Schweigg. l.c. p. 32; Dum. § Bibr. ii. p. 267 (1835) ; 
Holbr. N. Am. Herp. i. p. 49, pl. v. (1842). 
Terrapene serrata, Bonap. Osserv. s. sec. id. d. R. A. p. 155 (1830). 
Emys scripta, part., Gray, Cat. Tort. p. 25 (1844), and Sh, Rept. i. 
p. 26 (1855). 
Trachemys scabra, Agassiz, Contr. N. H. U. 8. i. p. 454, pl. ii. figs. 
15-15 (1857). 
Clemmys serrata, Strauch, Chelon, Stud. p. 52 (1862), and Verth. 
Schildkr. p. 77 (1865). 
Trachemys scripta, Gray, Ann. § Mag. N. H. (8) xii. p. 181 (1863), 
and Suppl. Cat. Sh. Rept. i. p. 48 (1870). 
Pseudemys scabra, Cope, Check-List N. Am. Rept. p. 52 (1875). 
Carapace rather convex, keeled, serrated posteriorly, each posterior 
marginal being notched ; shields with radiating ridges in the young, 
longitudinally rugose in the adult; nuchal narrow; first vertebral 
not or but slightly broader in front than behind, usually with 
sinuous lateral borders; second and third vertebrals usually broader 
than long, narrower than costals. Plastron truncate anteriorly, 
openly emarginate posteriorly ; the width of the hind lobe at the 
utmost hardly one third the width of the carapace, its length equal, 
or not quite, to the width of the bridge ; the longest median suture 
is that between the abdominal shields, the shortest that between the 
humerals; axillary and inguinal large. Head moderate ; snout 
short, feebly projecting ; jaws not or but very slightly denticulated, 
upper with a small median notch ; alveolar surfaces of upper jaw 
broad, narrower in the middle than on the sides, with feeble median 
ridge; the width of the mandible at the symphysis a little less 
than the horizontal diameter of the orbit. Digits very broadly 
webbed ; claws extremely long in the male. ‘Tail short. Carapace 
of young with narrow dark olive lines close together on a light 
