310 



ZOf^LOOY 



SECT. 



of skin covered by a gelatinous film. The embryos, wbicli have 

 a large yolk-sac, develop in these pouches ; tliey never possess 



Fio. 956.— Nototrema marsupiatum. Fuuuik', with pnucli opened. (From Mivart.) 



external gills, and are hatched in the adult form. In the case 

 of several species the tadpoles are carried about by the female, 

 adhering to her dorsal surface by suckers or by a viscid secretion. 



Fir:. 0,')".— Pipa americana. IViuaK-. (I'rom Mivai-t.) 



Another Anuran, Pseudis paradoxa, is remarkable for the fact that 

 the tadpole is many times larger than the adult. 



Some Salamanders (S. maculom and S. atra) and a species of 

 Cajcilia are viviparous. In the Black Salamander (*S^. atm), though 



