NATURAL SCIENCES OP PHILADELPHIA. 155 



finger, are tinted and spotted in the same manner. The superior surfaces of 

 the femur, tibia, humerus and fore-arm, are of the same color as the back, 

 that of the humerus separated from the green of the jaws by an isthmus of the 

 purplish shade, and that of the tibia separated anteriorly from the saffron of 

 its lower surface by a band of mulberry. The green of the back and ex- 

 tremities is everywhere margined with pure white, except posteriorly on the 

 femur and tibia, and anteriorly on the former, where saffron takes its place. 

 The green crosses the rictus and forms an oval spot upon each side of the 

 throat. The borders of the latter and the chin are tinged with mulberry. 

 Beneath whitish flesh color. The exposed surfaces of the anterior and posterior 

 extremities, where not green, are of a shade intermediate between mulberry and 

 chocolate. 



Length of head and body 1 in. 8 1. Femur 8 1. Tibia 9 1. Tarsus and foot, 

 to the end of the longest toe, 121 1. 



The following are the differences which I discover upon a comparison of this 

 species with many specimens of the Hyla arborea of Europe. The head is 

 relatively broader and more obtuse. The vomerine teeth are in two oblique 

 lines, not in symmetrical fasciculi. In coloration we notice, first, the arborea 

 is entirely destitute of the saffron spots and shades so distinct in the ander- 

 sonii. Second, the carpus and tarsus of the latter are destitute of any green 

 shade or band so usual in the arborea. Third, the green is bordered with 

 white, not yellow, and the green of the extremities is much more distinctly 

 bordered than in the arborea. Fourth, the lateral band, and that on the 

 anterior face of the tibia, is of an impure mulberry shade, instead of brown 

 or greenish. 



I am indebted to Dr. Jos. Leidy for a beautiful specimen of this frog. It was 

 found in a cedar swamp, near the town of Jackson, in New Jersey, sixteen 

 miles east of Philadelphia. Without careful examination of the specimen, he 

 supposed it to be the viridis of the Southern States, from its great re- 

 semblance to that species, and presented it as such, at the meeting of the 

 Academy the same evening. (Vid. Proc. Acad, for July, p. 305.) At the same 

 time Baltimore was given as its northern limit upon the authority of Dr. Uhler 

 of that place. As Dr. Holbrook gives lat. 33 as the most northern habitat 

 known to him, it would be interesting to receive specimens from Baltimore, as 

 there is a possibility of the supposed viridis being the andersonii. 

 Lysapsus 1 i m e 1 1 u m.* 



Char. gen. Family Hylidae of Gunther. Anterior extremities free. Interior 

 digit opposite the three external. Proximal phalanx of external, posterior 

 digit entirely free from that of the second ; all the digits broadly palmate. 

 Pallettes slightly developed. Vomerine teeth in two fasciculi. Tongue broad, 

 slightly free, nearly entire. Skin rugose above, not smooth below. 



This genus is related to Litoria, but differs from it, and from most, if not all, 

 other genera of Opisthoglossa platydactyla, in the freedom of the basal 

 phalanx of the external digit. 



Char, specif. Head as wide as the body. Muzzle acute, with rounded out- 

 lines. Canthus rostralis none. Nostrils vertical. Tympanic disc half the size 

 of the eye. Internal nares smaller than ostia pharyngea tubarum eustachii. 

 Vomerine teeth in two well-separated fasciculi, near to and behind the nares. 

 Tongue very broad, subtriangular, obtusely emarginate and slightly free 

 posteriorly. Inferior surface of limbs smooth, of body areolate or transversely 

 plicate, except on the middle of the thorax. Upper surfaces as far as interior 

 orbital region, minutely and firmly rugose, resembling shagreen. Palms not 

 tubercular; basal phalanges thickened. Hinder extremities very long, knee 

 reaching nearly to tympanum. Palm smooth, a small acute cuneiform tubercle 

 at the base of the internal digit. External digit longer than the third. 



*Lima, a file, shagreen. 



1862.] 



