6*8 CADUCIBRANCHIATA. 



4. Pletbodon croceater, Cope. 



Color above black, below reddish orange ; parotid re- 

 gion with a very large reddish orange spot ; four simi- 

 lar spots present on each side of the back; base of tail 

 with a pair of spots; limbs orange, with a transverse 

 band of black below the knee; head broad; maxillaries 

 converging; muzzle truncate; vomerine series of teeth 

 in two arcs ; eye large ; postorbital, and parotid grooves 

 distinct ; costal furrows thirteen, not well marked ; tail 

 slender, subcylindrical, exceeding the length of the body • 

 limbs long and slender. 



Length 6 inches. Head to cervical fold 5 lines. 



Tail 3^" Breadth of head 6^" 



Habitat Lower California. 



5. Pletliodou intermedins, Baircl. 



This species is very clearly related to P. erythronohis, 

 from which it is separated by having fourteen instead of 

 sixteen to nineteen costal furrows, thus shortening the 

 main part of the body. The feet are scarcely at all pal- 

 mate, and the third and fourth toes much longer. Its 



