xiir 



PIIYLriM CHORDA TA 



•m) 



tadpoles are ready to be hatched. lu lihinodciiu'C chna-ini, 

 a little South American Frog, they are transferred by the male 

 to his immense vocal sacs, which extend over the whole ventral 

 surface, and there hatched. In another Anuran, Kototrcmc 

 (Fig. 95U), there is a pouch on the back of the female in which 



B 



I —»i//(Od/ 



Ov.-- 



m/foaj 



Fig. [150. — Diagrams of urinogenital organs of male (A) and female (B) TJrodele. a, cullectlng 

 tubes; GN, sexual portion of kidney; Ho, testis; Uj. (£/y.) "Wolffian duct (ureter); mg, -mj/'. 

 vestigial MuUerian duct of male; hkj. {Oil), oviduct; iV, non -sexual portion of kidney ; 

 Ov. ovary; Ve, vasa efferentia; t, longitudinal canal. (From Wiedersheim'.s Coiapo.viiAict 

 Aaalomij, after Spengcl.) 



the 



eggs 



are stored, the young 



being- 



hatched in some species 



as tadpoles, in others in the adult or Frog-form. In the Surinam 

 Toad {Pipo amcriauia, Fig. 957) the skin on the back of the 

 female becomes soft and spongy during the breeding season : the 

 eggs are placed on it by the male, and each sinks into a little pouch 



VOL. II U 



