MALE ACCESSORY REPRODUCTIVE ORGANS 237 



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

 in Rodents is believed by Camus and Gley 1 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 2 has also adduced experimental evidence pointing 



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;..v . '.... ..-* ^%. 



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IV 



FIG. 57. Section through prostate gland of monkey. 



a, tubular alveolus lined with epithelium ; 6, alveolus containing concretion 

 in lumen ; r, bundle of muscular fibres iu connective tissue ; rf, blood- 

 vessels in stroma. 



to the conclusion that the prostatic fluid of the dog stimulates 

 the sperms to more active movement. 



IwanofF s experiments 3 (see p. 234), however, show that 

 spermatozoa which have never come into contact with prostatic 



1 Camus and Gley, loc. cit. 



Walker (G.). " Beitrag zur Kenntniss der Auatomie und Physiologic der 

 Prostata beim Hunde," Arch. f. Anat. u. Phya., Anat. Abth., 1899. 



* Iwanoff, toe. cit. 



