ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 



99 



are no cranial ridges except a protuberant supra-tympanic ; the superciliary ridges 



are slightly prominent and continued behind in straight lines by two angles of the 



parietal bone. No trace of membranum tympani. The canthus rostrales are 



straight and angular, and the lores elevated ; the nares are nearer to each other 



than each is to the orbit. The tongue is large and elongate. The skin of the 



back and sides is studded with numerous spaced tubercles, and the lower surfaces 



are nearly smooth. There is no tarsal fold, and the palmar and plantar tubercles 



are obsolete. The digits are all distinct, those of the hind foot half-webbed. The 



wrist of the fore limb, and the end of the second toe of the hind limb extended, 



reach the end of the muzzle. 



M. 

 Length of head and body ........ .025 



Width of head behind .008 



.003 

 .010 

 .021 

 .014 

 .005 

 .023 

 .013 



Upper surfaces blackish, the tubercles brown ; below black, thickly marked 

 ■with light blue spots. 



From 3000 to 5000 feet elevation on Pico Blanco. 



7. BuFO ATJRiTUS, Cope, sp. nov. 



Vertex flat, bounded by a vertical superciliary crest on each side, which is 

 slightly bent where it gives off the postorbital crest, and then continues to the 

 posterior border of the cranium. Post-orbital ridge prominent, presenting an open 

 angle where it gives off the supratympanic, particularly prominent as the anterior 

 border of the tympanic membrane. Supratympanic horizontal, prominent. Supra- 

 orbital crests abruptly incurved at the loreal region, and separated by a narrow 

 groove at the summit of the muzzle. No preorbital crest. End of muzzle narrow, 

 produced beyond the line of the upper lip ; external nares nearer each other than 

 the orbit. Parotoid gland quite small, surmounted by several dermal spines. 

 Tubercles of the skin small, spinulose, most numerous on the sides, wanting below. 

 Tarsus without fold, spinulose ; palmar and solar tubercles insignificant. Digits 

 elongate, the fingers remarkably so; the toes half-webbed. The wrist reaches 

 beyond the end of the nose, as does also the heel of the extended hind limb. The 



mg\ 



th to orbit . 



(( 



to axilla 



(( 



to groin . 



" 



of fore limb 



a 



of fore foot 



ii 



of hind limb 



(( 



of hind foot 



