NATURAL SCIENCES OP PHILADELPHIA. 341 



between external nares and orbit to that between nares and end of snout 

 as three to two. Skin without corrugations, but with numerous elongate longi- 

 tudinal plicae. Tympanum half the size of the orbit. Ostia pharyngea not 

 larger than internal nares. Vomerine teeth in nearly transverse series, com- 

 mencing at the anterior margin of the nares. No vocal vesicles. Second finger 

 little shorter than fourth ; terminal phalanges, especially of the toes, acute. 

 One metatarsal tubercle. Web reaching the base of the antepenultimate pha- 

 lanx of the very long fourth digit ; to the penultimate of the others. Length 

 of head and body 1 in. 3 lin. ; of posterior extremity 2 in. 1 lin. 



Above brown, with a pale median line from the end of the muzzle, and a 

 few darker brown small round spots. Superior labial and frenal regions pale. 

 A dark blotch covers the tympanum. Femora and tibiae distantly brown- 

 banded. Beneath pure white. 



The specimens at my disposal possesses the peculiarity in the form of the 

 terminal phalanges, which is found in the R. hexadactyla and 1 e s c h e- 

 n a u 1 1 i i. The R. mascariensis is not recorded as occurring on the 

 African continent. 



Dicrog'ossus angustirostris Cope. 



Outlines of muzzle convergent at an acute angle ; the end obtuse, promi- 

 nent. Canthus rostralis rounded. Nostrils vertico-lateral. Interorbital space 

 a little wider than palpebra. Tympanum small, one-fourth the size of the 

 eye. Skin of the upper surfaces coarsely tuberculous. End of first finger 

 marking middle of third. Posterior extremities stout ; a tarsal and two meta- 

 tarsal tubercles. Toes half palmate. Tongue oval, obcordate. Ostia pha- 

 ryngea larger than posterior nares ; the latter very anterior. Muzzle to 

 hinder border of tympanum 4 lin. ; tympanum to end of coccyx 10 lin. ; 

 length of hinder extremity 1 in. 7 lin. 



General color dark brown, hinder extremities and labial regions varied with 

 darker. Below white, a large brown pectoral and several small labial spots. 

 Groin pale, brown spotted. 



Dicroglossus adolfi Gthr., the other known species of the genus, is Hini- 

 rnelayan. The discovery of the present species extends the range of the genus 

 so as to coincide with that of Tomopterna, Bibr. 



Chilophryne dialopha Cope. 



Head broad ; muzzle prominent, conic. Cranium strongly ridged. Pre- and 

 postocular, supratympanic, and superciliary ridges well developed, the last 

 making a very open angle with that of the canthus rostralis, and sending off 

 posteriorly a parietal, which first converges toward that opposite, and then 

 runs transversely on the occiput to meet it ; failing in this by a very slight 

 interval. A small nuchal pit. Tympanum in contact with postorbital ridge, 

 only one-fourth the size of the orbit. Tongue small, narrow, half free ; a 

 strong symphyseal tubercle fitting a premaxillary pit. Paratoids large, short, 

 subtriangular, lateral. Skin everywhere rigidly rugose, subspinous ou the 

 tarsus. The joints of the extremities are pale and appear swollen. Fingers 

 slender; first shorter than second, which equals the third. One metacarpal 

 tubercle only. Toes short, one-third webbed ; two acute metatarsal tubercles, 

 the internal large, incurved, like a flattened spur, yellow, brown tipped. 

 Length of head and body 10 lines ; of hinder extremity 12 lines. Above 

 dark brown, with a pale vertebral band, on either side of which are two 

 blackish dorsal spots, one temporal and one on the canthus rostralis. A black 

 band from orbit to angle of mouth. Beneath light brown, blackish shaded. 



This very distinct species is said to have been brought from the Sandwich 

 Islands by the American zoologist, John K. Townsend. Museum Academy, 

 Philada. 



Hyperolius horstockii Gthr. and H. marmoratus Rapp, have been 

 obtained at Umvoti in Natal by the Rev. Dr. Grout. 



1862.] 



