URINOGENITAL ORGAXS 



355 



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Fig. 281. — Kidney of Disi:oijlossui piciu-i. From the ventral surface, showing 

 the nephrostomes {ST). (After J. \V. Spengel). 



Ur, iirinogenital duct, enlarging at Ur ^ to form a seminal vesicle. 



veins. In consequence of this change of function, for such it must be 

 considered, tlie body-cavity of adult Anura forms a closed lymph-sinus, as in 

 the Amniota ; the peritoneal fluid, which in the larva was carried to the 

 exterior and lost, is in the adult poured into the general circulation, like the 

 rest of the lymph. 



A A 2 



