F. A. E. Crew 147 



Left gonad. An ovo-testis consisting of a larger ovary-portion bear- 

 ing upon its inner border a nodule of spermatic tissue. There was a 

 second nodule of this tissue upon the outer border, 



Vasa efferentia (of the usual male pattern ?). 



Seminal vesicles not present. 



Miillerian ducts — right moderately, left well-developed. 



No sections made. 



Group C. Those cases in which, on insj^ection, one gonad was an ovo- 

 testis and the other a testis. None. 



Group D. Those cases in which, on inspection, both gonads were testes. 

 None. 



Division II. Those Cases in which the Secondary Sexual 

 Characters were Typically Male. 



Group A. Those cases in tvhich, on inspection, one gonad was an ovarg 

 and the other an ovo-testis. None. 



Group B. Those cases in luhich, on inspection, both gonads were ovo- 

 testes. 



8. BouLANGE. R. fusca. Adult. Killed December. Secondary 

 sexual characters typically male. 



Right gonad. An ovo-testis of which the testis-portion constituted 

 three-quarters of the whole gonad and was situated anteriorly. 



Left gonad. An ovo-testis of which the three-lobed ovary-portion 

 formed four-fifths of the whole and encompassed the testis-portion which 

 lay upon its inner border. 



Vasa efferentia were present in association with the testis-portions 

 of both gonads. 



Seminal vesicles were not present. 



Miillerian ducts well-developed. 



On section, the ovarian portions showed the structure of normal im- 

 mature ovaries : the testis-portions, that of normal testis. 



9. Punnett. R. temporaria. Adult. Killed February. Secondary 

 sexual characters male. 



Right gonad. An ovo-testis with a very large testis-portion bearing 

 a deep constriction upon its inner border. The ovary-portion was merely 

 a patch of ovarian tissue situated upon the outer border of the testis- 

 portion exactly opposite the constriction upon the inner border, and it 

 lay within a deep angle of testicular material. 



Journ. of Gen. xi 10 



