CADUCIBRANCHIATA. 73 



wards; sphenoidals in two elongated groups, not touch- 

 ing the vomerines; tongue boletoid ; eyes prominent; 

 parotids wanting; toes palmate, four in front and five 

 behind. 



Soma writers designate the first species as Geotriton, 

 and the remainder as Oedifais, because vsxfuscus the two 

 praemaxillaries are distinct, and are united in the others; 

 but this is a characteristic difficult to determine, and 

 probably the result of an immature condition. Until, 

 then, further researches establish the fact, one is not 

 warranted in making separate genera. 



Back black or brown; no dorsal band, (a) 

 Back yellow, or with yellow dorsal band, (d) 



a. Costal furrows ten or eleven, (b) 



a. Costal furrow r s twelve or thirteen, (c) 



b. Toes w r ith two free phalanges. 



G. FUSCUS. (1) 



b. Toes completely palmate. G. rufescens. (4) 



c. Body below and limbs dotted with white. 



G. morio. (2) 

 c. Body and limbs uniform dark brown. 



G. AETAMAZONICUS. (6) 



d. Body moderately elongated. 



G. CARBONARIUS. (3) 



d. Body short and thick G. adspersus. (5) 



