105 



The whole organ was much smaller 

 than the testis on the other side — 

 being only 8 mm long, with a maxi- 

 mum breadth of 2 mm. The kidney 

 was 15 mm long. 



Right side. The Miillerian 

 duct was on this side in a more 

 rudimentary condition, and not con- 

 voluted at any part of its course. 

 Its anterior opening resembled that 

 on the left side, and stellate pig- 

 ment cells were present in large 

 numbers. The uterine portion curi- 

 ously difiered from that of the oppo- 

 site side in being densely pigmented. 

 The opening into the cloaca was 

 normal. The ureter left the kidney 

 as a single tube, and was slightly 

 larger than the left, the vesicula 

 seminalis being again absent. It 

 was also attached to the Miillerian 

 duct, and opened as usual into the 

 cloaca. The testis was somewhat 



Fig. 1. Ventral view of urino-genital organs, ^ 2. a. dorsal aorta; cl. cloaca; 

 c. ad. fat bodies ; g. genito-renal artery ; Ic. kidney ; m. d. oviduct ; o. t. ovo-testis ; 

 la. dorsal view of same. Note in both the disposition of the testis and pigment portions ; 

 M. ureter ; ut. uterine portion of oviduct ; v. ef. vasa efferentia. 



enlarged (11 mm by 5 mm) and non-pigmented, and the vasa efferentia 

 more numerous. The kidney here was 17 mm long. 



The fat bodies were fairly and symmetrically developed and 

 were in both cases attached to the anterior end of the reproductive 

 gland. 



Serial sections were cut of both testes and stained in section with 

 Ehrlich's acid haematoxylin and eosin. I had intended cutting a large 

 number of frogs testes, in order to ascertain whether, as seems probable, 

 the occurrence of stray ova in the testis is not a fairly common 

 variation (cf. Eismond 12) ; but have hitherto not been able to find the 

 leisure to do so. Dr. Beard informs me that well developed ova 

 occur apparently normally in the testis of the toad quite apart from 



