ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 109 



The shorter hind limbs and larger tympanic membrane, with the more 

 transverse and widely separated vomerine teeth, distinguish this from the last 

 species. Represented by one small specimen from the Pico Blanco. 



29. LITHODYTES HABENATUS, Cope, Sp. nOV. 



This species, also represented by one specimen, agrees with the Lithodytes 

 muricinus in the points just enumerated in which it differs from the L. podiciferus. 

 Its general color is blackish-brown above, and dirty-white below. On each side 

 above, a white band extends from the orbit to the middle of the side, where it is 

 continuous with the pale color of the abdomen. The vomerine teeth are in small 

 fasciculi, well separated, and both behind and within the line of the nares. 



M. 



Length of head and body 022 



" hind limb 037 



" hind foot . 015 



From the Pico Blanco. 



30. Lithodytes melanostictus, Cope, sp. nov. 



A species of distinct type from the preceding in its short head and longer body. 



Size of Rana temporaria. The vomerine teeth are in two short transverse series 



entirely behind the inner nares, well separated from each other and not extended 



outwards beyond the line of the inner margin of the nares. Choanse and ostia 



pharyngea sub-equal ; tongue sub-round, one-third free, and a little emarginate 



behind. Head flat, wide, muzzle projecting a little, canthus rostrales straight 



convergent. Nostrils more than twice as far from orbits as from end of muzzle ; 



their distance apart 1.33 times in their distance from the orbit. Loreal region 



and lip oblique. Diameter of eye equal distance from its border to the nostril, 



its area four times that of the membranum tympani, which is a rather narrow 



vertical oval. Skin everywhere smooth. Limbs long, dilatations of fingers large, 



of toes moderate. The muzzle marks the middle of the cubitus and a little 



beyond the middle of the tibia. The order of lengths of the fingers is, 1-2-4-3 ; 



first and third toes equal. The sternum is a wide cartilaginous shield notched at 



the end. There is a well-developed zygomatic process of the squamosal bone, but 



no corresponding malar process. 



M. 



Length of head and body ........ .050 



" to angle of jaws (axial) . B . . . . .015 



Width of head at angle of jaws 022 



Length to orbit (oblique) ........ .007 



