G. CIIKYSEMYS. 77 



suture is that, between the abdominal shields, the shuitrst that 

 between the humerals; axillary and iniijuiiial shields present. Head 

 remarkably small and narrow, snout a little pointed; upper jaw 

 slii-litly einarginate mesially. Digits very broadly webbed, claws 

 extremely long in the male. Tail about one f(nirtli the length of 

 the shell' in the male. Carapace olive-brown, tinged witii 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, witli yellow lines and bauds. 



Length of shell 30 centim. 



Tennessee and Georgia. 



G. Chrysemys scripta. 



Testudo scripta, Sr/iocpf, Tcstud. p. 10, pi. iii. fig. 3 (1702); I)aud. 



Bept. ii. p. 140 (1802 J. 

 serrata, Daud. I. c. p. 148, pi, xxi. figs. 1, 2 ; Leconte, Ann. 



Lye. N. Y. iii. p. 105 (I8:i0). 

 Emys scripta, Sclnreit/(j. Prodr. p. 28 (1814). 

 serrata, tSchini'>/'(/. I.e. p. .'52; Ihwi. ^- Bibr. ii. p. 207 (1835) ; 



Holhr. N. Am. Ihn'p. i. p. 40, pi. v. (1842). 

 Terrapene serrata, Bonap. Osserv. s. sec. Ed. d. R. A. p. 155 (18.30). 

 Emvs scripta, part., Graij, Cut. Tort. p. 23 (1844), and Sh. llcpt. i. 



p! 20 (1855). 

 Trachemvs scabra, Acjussh, Cuntr. N. II. U. S. i. p. 434, pi. ii. figs. 



13-15 (1857). 

 Clemmys serrata, Strmich, Chelon. Stud. p. 32 (1802), and Verth. 



Schifdkr. p. 77 (1805). 

 Trachemys scripta. Gray, Ann. ^ Mag. N. H. (3) xii. p. 181 (1803), 



and Suppl. Cat. 8h. ttept. i. p. 48 (1870). 

 Tseudemys scabra, Cvpe, 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 youug, 

 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. Plasti'ou 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 



