58 New Species of Batracian Reptiles. 
and black, and the reverse; though the specific markings are 
more or less unchangeable. 
Though the frog 1s subjected to change of cuticle, this does 
not take place throughout the body at once, as in the serpent, 
but falls off in detached pieces. J! could not determine how 
frequently this process was repeated ; but certainly not every 
“eight days.” With these preliminary remarks, } proceed to 
ihe more immediate object of this paper, the description of 
several new species. 
Sp. 1. Rawa flaviviridis. (Nobis.) Yellow-throated green 
frog. Spring frog? Bartram, Manuscript Notes 
penes me. 
Char. essent. Body rather clumsy ; abdomen large ; snout a 
little obtuse ; colour above clear lively green, beneath white : 
under the throat yellow; buttocks mottled with black spots. 
Dimensions. Length of the body three inches, of the hind 
legs four inches four tenths; breadth of the head one inch, 
Description. (Male.) Body rather contracted; abdomen 
enlarged; prevailing colour green; skin smooth, with the 
exception of the sides, which are tuberculated ; the back is 
separated from the sides by a longitudinal cuticular fold; the 
sides are obsoletely spotted; tympanum very large, suboval, 
plane and dark-coloured at the circumference, protuberant 
and green at the centre; buttocks and posterior part of the 
thighs mottled with black spots; thighs and legs above marked 
with obsolete black bands; toes of the hind feet palmated, 
granulated, and of a blackish colour. 
Habit. Not very active; destitute of any peculiar odour: 
destructive to small fish, grasshoppers, and worms. 
Inhabit the middle states; abound in the vicinity of Phila- 
del phia. 
Sp. 2. Rawa sylvatica. (Le Conte, Ann. of the Lyc. of 
Nat. Hist. of N. York, vol. 1. no. ix. p. 282.— 
Wood frog.) This species I had described under 
the name of R. Pennsylvanica. 
Char. essent. Olive brown or drab colour above, white be- 
neath; a black vitta, commencing on the side of the snout, 
passes backwards dilating, and involves the eye and tympa- 
num; posterior extremities obsoletely fasciated. 
Dimensions. Rather smaller and more slender than the 
R. clamaia. 
Description. Body long and slender; snout rather elon- 
gated: a longitwdinal black band en each side of the head. 
