60 [May, 1844. 



me by my friend Dr. W. Blanding. It resembles, if my memory 

 be correct, (not having the work now by me,) a South African 

 species described by Dumeril and Bibron, but I believe it to be 

 distinct. The description is taken from a specimen preserved in 

 spirits. 



Genus Ixalus, Dum. and Bibron. 



I, concolor. Head large, triangular, flattened above, snout 

 slightly rounded, nostrils small, situated very near the mouth; 

 eyes large, rather prominent ; tympanum small but distinct, open- 

 ing of the mouth of moderate size, tongue oblong-ovate, notched 

 posteriorly, teeth in the upper jaw very numerous, small, of equal 

 size ; palatine teeth wanting ; posterior nares rather large, rounded ; 

 eustacbian foramina of nearly equal size as the nares, but less 

 distinctly circular; extremities slender; fingers depressed, of mo- 

 derate size, slightly palmated; terminal pellets circular, tubercles 

 distinct, but not remarkably prominent, toes slender, palmated, 

 terminal phalanges not included within the membrane; disks 

 small; tubercles but slightly developed; skin smooth, except 

 upon the abdomen, where it is granulated. 



Colovr. Body, head, and extremities of a uniform light choco- 

 late colour ; jaws and throat of a dirty white ; abdomen and under 

 surface of extremities dark chocolate. 



Dimensions. 



Length of head, ...... 



Greatest breadth, 



Length of head and body, ... 



" posterior extremities to extremity of 

 fourth toe, - - - - 



" anterior to extremity of longest finger, 

 Habitat. — Liberia, W. Africa. Specimen in Mus. Acad. 



Genus Leptophis, Bell. 



L. gracilis. Head large, rather broad, flattened, slightly de- 

 pressed in front, covered with nine plates exclusive of the rostral 



