1. CINOSTERNUM. . 39 
Very closely allied to C. pensyluanicum. Sizelarger. The suture 
between the pectoral shields two thirds the length “of that between 
the humerals, and nearly equalling the length ‘of the gular. The 
plastron is even rather smaller than in C. pensyloanicum, and the 
front lobe is not broader than the hind one. C. hirtipes may be 
regarded as intermediate between C. odoratum and C. pensyluanicum, 
as observed by Leconte. 
Length of shell 12 centim. 
Mexico. 
4. Cinosternum pensylvanicum. 
Testudo pensylvanica, Gmel. S. N. i. p. 1042 (1788) ; Schoepff, Test. 
p- 107, pl. xxiv. fig. A (1792); Daud. Rept. ii. p. 182, pl. xxiy. 
figs. 1, 2 (1802). 
Emys pensylvanica, Schweigg. Prodr, p. 44 (1814). 
Terrapene pensylvanica, Merr. Tent. p. 27 (1820). 
Cistuda pensylvanica, Say, Jowrn. Ac. Philad. iv. p. 216 (1825). 
Kinosternon He os S0r Bell, Zool. Journ. ui. p. 804 (1825) ; 
Dum. §& Bibr. p. 3867 (1835); Holbr. N. Am. Herp. i. p. 127 
OE 3-o-ale (1842); ieee Cat. Tort. p. 33 (1844); Leconte, Proc. 
Ae. TEs 1854, p. 183; Gray, Cat. Sh. Rept. i. p. 45, pl. xx. c. 
fig. 1, 2 (1855) ; "Str auch, Cheion. Stud. p. 144 (1862), ), and Verth, 
Schildker. p. 98 (1865); Bocourt, Tour n. de Zool. ii. p. 392 (1876). 
oblongum, Gray, Cat. Tort. p. 33. 
—— doubledayi, Gray, 1. c., and Cat. Sh. Rept. i. p. 45, pl. xx. 
punctatum, Gray, Cat. Sh. Rept. i. p. 45, pl. xx. c. figs. 5, 6 
and Suppl. p. 67 (1870). 
hippocrepis, Gray, Cat. Sh. Rept. i. p. 46, pl. xx. c. figs. 3, 4, 
and Suppl. p. 67. 
Thyrosternum pensy lvanicum, Agass. Contr. N, H. U.S. i. p. 428, 
pl. iv. figs. 7-12, & pl. v. figs. 16, 17 (1857). 
Swanka fasciat ta, Gray, Suppl. Cat. Sh. Rept. i. p. 68. 
b) 
Head moderate; jaws strong; beak feebly hooked. Limbs 
moderately webbed. Carapace with three faint keels in the young, 
keelless or witha single faint keel in the adult. Plastron of mode- 
rate size, smaller than the opening of the shell, connected with the 
carapace by a bridge, the width of which is considerably less than 
the length of the front plastral lobe; front and hind lobes well 
movable in the adult; front lobe longer than the fixed portion, 
much narrower than the opening of the shell; hind lobe notched 
posteriorly; gular shield not half the length of the front plastral 
lobe ; pectorals triangular, inner angles meeting on the median line, 
or forming a very short suture; axillary and inguinal shields 
largely in contact. Male with a patch of small, horny, keeled 
tubercles on the hinder side of the leg, and another below the thigh. 
Tail ending in a nail-like horny tubercle. Carapace brown or 
brownish ; plastron yellow or brown; all the sutures between the 
shields of the shell dark brown or blackish. Head and neck brown 
above, with yellowish spots, often with two more or less distinct 
yellowish streaks on each side, proceeding from the orbit; jaws 
yellowish with brown dots or lines. 
Length of shell 11 centim. 
Eastern North America, from New York to the Gulf of Mexico. 
