i6 



Diseases of (he Genital Organs 



puce is wholly free from hairs; the sheath at its external 

 opening contains numerous hairs. In the bull these are 

 greatly developed to constitute the preputial tuft. The pre- 

 putial sac of solipeds forms and opens early in embryonic 

 life, but ruminants and swine are born without this struc- 

 ture. The new-born male soliped can readily protrude the 

 penis and commonly does so when urinating. The young 

 ruminant and porcine male cannot protrude the penis, as 

 is shown in Figs. 8 and 9, and necessarily urinate in the 

 sheath. With the advent of puberty, the frail layer of em- 

 bryonic tissue, serving to bind the prepuce to the glans, 



Fig. ga— Penises of Steers showing' various degrees in the 

 development of the Prepuce. 



The left hand figure shows in tlie glans a few elevations from the granular 



venereal disease. 



