NATURAL SCIENCES OP PHILADELPHIA. 501 



apart; canthus rostralis slightly excavated ; the ridge between the snout and 

 the eye separating this region from the upper part of the head, presenting a 

 slight convexity inward : tongue cordiform, notched posteriorly, eustachian 

 foramina more oval in shape than the posterior nares ; vomerine teeth in 

 two transverse rows, on a line with the anterior margins of the posterior 

 nares, inclining backward toward each other, separated by an interval of 

 more than half a line ; skin smooth above, of a cserulean color in alcohol ; 

 the posterior part of thighs, legs and tarsi whitish ; under parts white, the 

 abdomen very much granulated ; fingers and toes semipalmate ; a series of 

 dark colored spots upon the flanks. 



Dimensions. Length of head and body 1 inch 4 lines ; breadth of head 6.V 

 lines; of arm 4 lines ; of forearm 3 lines; of hand to extremity of longest 

 finger 5 lines ; of thigh 8 lines ; of leg 8 lines ; of foot to extremity of longest 

 toe 6 lines. 



Habitat. Loo-Choo. Taken at Loo-Choo, December, 1854, by Mr. Wright. 

 Color during life pale green above, below pale red ; no dark line of separation 

 between these colors. (Notes of Mr. Stimpson.) 



Gen. remarks. This species evidently belongs to the same genus as Poly- 

 pedates megacephalu s, found at Hong Kong, and remarkable for the two 

 patches of rugosities upon the vertex ; the animal, however, is quite different 

 from the Polypedates rugosus of Ceylon and the Phillipines. 



POLYPEDATES BURGERII D. & B. 



Erpet. Generale, torn. viii. p. 521. 



Syn. Hyla Burgerii Schlegel, Fauna Japonica, p. 113, pi. 3, fig. 728. Ousima, 

 Japan. . A small specimen from the Loo-Choo islands. 



Ixalus Tsch. 



Ixalus Japonicus nob. 



Char. Head of moderate size ; nostrils small, lateral, | line apart ; body 

 rather slender, much more so than in Hyla versicolor; posterior extremi- 

 ties quite long, webs reaching to the antepenultimate phalanx ; color ash grey 

 above, in some specimens very pale ; a transverse blotch upon the head, with 

 a posterior triangular prolongation ; several other blotches upon the back, one 

 presenting the form of the two halves of the letter X, separated by a hori- 

 zontal line. In one of the specimens the transverse bar is wanting ; 

 a brownish spot in front of the shoulder; a narrow oblique band behind 

 the tympanum ; lower lip spotted with black ; upper lip also, but the spots 

 are broader and more oblique ; an oblique fold above the tympanum, 

 commencing behind the eye ; tympanum distinct, of a brownish color ; upper 

 part of head and anterior part of body presenting a number of tubercles ; can- 

 thus rostralis concave; ridge between the eye and the nostril presenting a 

 convexity inward ; snout rounded, and somewhat acute; abdomen and under 

 part of thighs posteriorly granulated. 



Habitat. Japan. 



Gen. remarks. This species corresponds very nearly with the description of 

 Ixalus s e m i f a s e i a t u s D. & B., in torn. viii. p. 523 of the Erpetologie 

 Generale. It is there mentioned, however, that the palmation of the toes does 

 not extend beyond one-half of their length. In the Japan specimens it would 

 appear to be larger. In Schlegel's figure, which represents a much smaller 

 animal, there are no webs to the toes. Ixalus semifasciatus is an inhabi- 

 tant of Java. Future observation must determine whether the two animals be 

 identical or not. 



China. 

 There are in the collection no Chelonians from China, and but three Saurians, 

 I860.] 



