556 



ANURA 



[CH. 



The kidney is a comparatively short and broad organ, very 

 different from the long tapering organ of the Newt. The testis is 

 connected by vasa eiferentia with certain special tubules of the 

 kidney. These tubules do not open into the archinephric duct, but 

 into a special duct which runs along the surface of the kidney and 



FIG. 276. The Frog. 



A. The urine-genital organs of the male, dissected from the front, after 

 removal from the body. From Howes. 



B. The urino-genital organs of the female, dealt with in the same manner as 

 the ahove, except that, in order to show the natural relations of the mouth 

 of the oviduct, the left lung and a portion of the oesophagus were also 

 removed from the body. 



A. 1. Fat^bodv. 2. Fold of peritoneum supporting the testis. 3. Efferent 

 ducts of testis. 4. Ducts of vesicula seminalis. 5. Vesicula seminalis. 

 6. Archinerthi ic duct. 7. XiXoaca^ 8. Orifice of ureter. 

 9. ProctodaeurrL W. Allantoic bladder 11. Rectum. 12. Kidney. 

 13. Jestig^ 14. Adrenal_bod r Y. 



B. 1. -jQaaaphagus. 2. Mouth of oviduct. 3. Left lung. 4. Corpus 

 adiposum. 5. Left ovary. 6. Archinephric duct. 7. Oviduct. 

 8. Allantoic bladder. 9. Cloaca. 10. Aperture of oviduct. 

 11. Aperture of archinephric duct. 12. Proctodaeum. 13. Fold of 

 peritoneum supporting the ovary. 14. Kidney. 



opens into the archinephric behind. Thus in a somewhat different 

 way the separation X)f urine and spermatozoa is carried out quite as 

 efficiently as in the Newt. The archinephric duct has a number 

 of pouches developed on its walls which collectively form the 

 vesicula seminalis in which the spermatozoa are stored up. In 



