56 



INTRODUCTION. 



a. No vesicula seminis. 



No ovary-like body in front of the testis 



Pelobatid^. 



An ovary-like body (Bidder's organ) between the 

 testis and the corpora adiposa . Bueonimc. 



d. A vesicula seminis formed by saccular en- 

 largement of the ureter. Hylidje, Ranid^;. 



A table is added showing the proportions of some of 

 the principal viscera in different species, the measure- 

 ments, in millimetres, being taken from males during 



the breeding season. 



1. Length from snout to vent. 2. Length of ventricle of heart. 

 3. Breadth of ventricle of heart. 4. Length of inflated lung. 5. Length 

 of longest lohe of liver. 6. Length of kidney. 7. Breadth of kidney. 

 8. Length of testis (in case of difference between the two testes, the 

 longer is measured). 9. Breadth of testis. 10. Length of corpora 

 adiposa. 



