$$ CADUClBRANCHTATA, 



portion. Parotid glands not forming an ovoid distinct 

 mass. Four phalanges in fourth toe,* 



A. Costal grooves ten; 



(a) vomerine series three. 

 Head broad, width 3.5 to groin; muzzle contracted, ex- 

 ternal nares much closer than the internal, palatine series 

 convex backwards; tail short, compressed; blackish^ 

 brown, grey speckeled ........ talpoideum. 



B. Costal grooves eleven. 



(a) Vomerine series three. 



b. No, or one, indistinct, plantar tubercle. 



Middle series transverse or concave behind posterior 



margins of nares; width of head in specimens of three 



inches greater than one fourth the length to groin in 



adult 4.7 times; black above with gray fascias; larger — 



OPACUM, 



Teeth as in the last ; width of head in small speci- 

 mens 3.5 to groin, in adults 4.5 times; a strong 

 dorsal groove and longer tail ; black above, with a series 

 of round yellow spots on each side the back, punctatum. 



Median series of teeth convex, advancing beyond pos- 

 terior margin of nares; width of head much less than one 

 fourth length to groin ; tail short, no dorsal groove ; lead- 

 colored with an inferior lateral and usually superior 

 series of small yellowish spots conspersum. 



bb. Two distinct plantar tubercles. 



Medium series of teeth straight, nearly divided ; exter- 

 nal nares much closer together than internal; width of 

 head more than one fourth length to groin; muzzle very 



* See exception under A. mavortium. 



