F. A. E. Crew 159 



projecting from the testicular stroma some ovules of notable size and 

 browned with darkish jjigment." Bidder's organ missing. 



Left gonad. Similar to the right. 



Vasa efierentia. " Relation to the kidneys normal." 



Miillerian ducts had been cut away before the examination was 

 made. On section the testis-portions had the normal structure. The 

 ovules seen projecting from the testicular stroma were in an advanced 

 stage of degeneration, being full of a granular substance — " in which 

 are present numerous granules of a yellowish-brown pigment and a rare 

 nucleus belonging to immigrant cells (perhaps leucocytes)." The ovary- 

 portions contained ova of all stages of development. The young and 

 medium were mostly normal though " in some the cytoplasm does not 

 appear homogeneous but in sections presents striae which stain deeply 

 with acid dyes. The nucleoli appear homogeneous or vacuolated and 

 the chromatic threads stain with great difficulty." " The larger ova 

 850-900 M. seem like normal cocytes of equal size, but sections of them 

 show easily that they are in a very advanced stage of degeneration, being 

 invaded by immigrant elements, probably leucocytes, and containing 

 numerous granules of yellow-brown pigment." 



(In one figure is shown a dark mass due to an accumulation of 

 granules of normal yellow-brown pigment, which Cerruti suggests re- 

 presents an egg in a more advanced stage of degeneration.) 



35. Spengel. Bufo cinereus {vulgaris). Adult. Secondary sexual 

 characters typically male. 



Each gonad consisted from behind forwards of a testis-portion, an 

 ovary-portion of several ovarian chambers and containing ova as large 

 as those seen in a female of 2 or 3 years. 



36. Knappe. Bufo vulgaris. Adult. Secondary sexual characters 

 typically male. 



Each gonad consisted from behind forwards of a testis-portion, a 

 Bidder's organ, an ovary-portion, another Bidder's organ. 



37. King. Bufo lentigijiosics. Adult. Killed March. Secondary 

 sexual characters male. 



Right gonad. An ovo-testis with testis-portion posteriorly. No 

 Bidder's organ. 



Left gonad. An ovo-testis, similar to that of the right side. The 

 ovary was placed where normally the Bidder's organ would have been. 



Vasa eflferentia present. 



Mullerian ducts still present but without terminal dilatations. 



