112 



OX THE BATRACHIA AND REPTILIA OF COSTA RICA. 



32. Lithodytes OULOSCS, Cope, sp. nov. 



The description of the L. megacephalus applies in many details to the present 

 frog. Thus, the vomerine teeth, tongue, tympanum, cranial crests, and extremities 

 are the same. The differences are seen in the absence of dermal plica;, the 

 coloration, and perhaps in the larger size. The color is a dark leather brown, 

 except on the pectoral and abdominal regions and inferior surfaces of the femur 

 and tibia, where the brown is irregularly marbled with white. There is a black 

 spot across the tympanum and one under the eye. 



The type specimen is a female containing mature eggs, and is twice as large 

 as the type of the L. megacephalus, equalling the Gnathophysa ocellata in bulk. 

 Its head is relatively smaller than in that species. Thus the width enters the 

 length of head and body in the former, more than twice ; in the latter, less than 

 twice ; the length of the head enters the same in the L. gulosus three times ; in 

 the L. megacephalus 2.66 times. 



Length head and body 



" head to orbit (oblique) 



" head to angle jaws 

 Width head at angle jaws 



" head between orbits 

 Length fore limb 



" fore foot 



" hind limb 



" hind foot 



M. 



.103 

 .015 

 .030 

 .047 

 .008 

 .060 

 .022 

 .138 

 .065 



The sternum of this species is a large cartilaginous plate, wide and deeply 

 emarginate behind, and slightly narrowed in front. From the same locality as the 

 last species. 



33. Hylodes cerasintjs, Cope, sp. nov. 



A slender species with oval head, and large digital dilatations. The vomerine 

 teeth are in two fasciculi well separated from each other, and well behind the line 

 of the internal nares, at the extremities of two longitudinal ridges, which diverge 

 slightly forward towards the inner margin of the choanas. The latter are about 

 the size of the ostia pharyngea. The tongue is of a narrow oval form. The head 

 is flat and the lores oblique. The muzzle is not produced beyond the lip, but is 

 narrowed towards the end, the canthus rostralis being concave. The nostrils are 

 twice as far from the orbit as from each other. Orbit large, tympanic membrane 

 distinct, very small, one-eighth the area of the eye. The skin is smooth above in 



