MALE ACCESSORY REPRODUCTIVE ORGANS 237 



(p. 233), the clotting which causes the formation of the " bouchon ' ' 

 in Rodents is beheved by Camus and Gley ^ to be due to a fer- 

 ment (" vesiculase ") which is present in the prostatic fluid. 

 The removal of the prostate in Steinach's experiments had 

 no effect in diminishing sexual desire. 



Walker ^ has also adduced experimental evidence pointing 







Fig. 57. — Section through prostate gland of monkey. 

 a, tubular alveolus lined with epithelium ; h, alveolus containing concretion 

 in lumen ; c, bundle of muscular fibres in connective tissue ; d, blood- 

 vessels in stroma. 



to the conclusion that the prostatic fluid of the dog stimulates 

 the sperms to more active movement. 



Iwanoff's experiments ^ (see p. 234), however, show that 

 spermatozoa which have never come into contact with prostatic 



' Camus and Gley, loc. cit. 



^ Walker (G.), " Beitrag zur Kenntniss der Anatomie und Physiologie der 

 Prostata beim Hunde," Arch. f. Anat. u. Phys., Anat. Abih., 1899. 

 ' Iwanoff, loc. cit. 



