1 6 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, 



PlG. 9a — Penises of Steers showing- various degrees in the 

 development of the Prepuce. 

 The K-ft hand figure shows in the glans a few elevations from the granular 



venereal disease. 



