194 PROCEEDINGS OF THE ACADEMY OF [1894. 



THIRD ADDITION TO A KNOWLEDGE OF THE BATRACHIA AND 

 REPTILIA OF COSTA RICA. 



BY E. D. COPE. 



The present paper is a continuation of the subject which has been 

 treated in several contributions, and is preliminary to a second illus- 

 trated memoir, which, it is hoped, will present the subject in some 

 completeness. The last "Addition" appeared in the Proceedings of 

 the American Philosophical Society for 1893, p. 333; and the illus- 

 trated memoir was published in the Journal of this Academy for 

 1875. 



I am indebted to the Museo Nacional of San Jose for the oppor- 

 tunity of examining the material here described. 



BATRACHIA. 



URODELA. 

 (Edipus robustus sp. nov. 



Size large ; proportions robust. Twelve costal folds. One pha- 

 lange of digits free, as in ffi. morio, except in the inner (first) digits, 

 which are entirely enclosed. Extended limbs separated by two 

 intercostal spaces. Head flat, wide ; muzzle short, its truncation 

 little conspicuous; no canthus rostralis. Width of head entering 

 length to groin five times. Eye small, its fissure equaling one- 

 fourth the width of the head, and less than the interorbital space. 

 Vomerine sei'ies straight in the transverse direction ; extending 

 beyond the nares externally, and abruptly recurved at the internal 

 extremity toward the parasphenoid patch, which they do not reach. 

 Parasphenoid patch not divided anteriorly. Tail rounded, the ex- 

 tremity moderately compressed. A gular fold. 



Color, uniform plumbeous ; soles paler. 



Dimensions 206 mm. ; length of head and body, 98 mm. ; to gular 

 fold, 22 mm. ; width of head at rictus oris, 16.5 mm. ; length of an- 

 terior limb, 20 mm. ; do. of fore foot, 6. 5 mm. ; length of posterior 

 limb, 21.5 mm. ; do. of hind foot, 6 mm. ; width of do. at base of 

 fifth digit, 7 mm. 



This is the largest salamander of tropical America, equaling in 



