124 Proceeding fi of the Royal Physical Society. 



In this manner a narrow funnel was formed, through 

 which the hinder end of the intestine (rectum) passed to 

 reach the ventral surface of the body between the posterior 

 halves of the innominate bones. The superficial end of the 

 rectum was encircled by the sphincter ani muscle, which in 

 this case was a special development of the panniculus 

 carnosus. The internal pudic nerve provided a direct nerve- 

 supply for this levator or compressor ani muscle. 



The Uterus Masculinus was a slender tube about 4 cm. 

 in length, and of the diameter of a crow-quill. It was 

 situated mesially in front of the prostate, on the dorsal or 

 pelvic aspect of the dilated vasa deferentia, and extended to 

 the mesial portion of their supporting peritoneal membrane. 

 As already described, this tube disappeared by entering the 

 prostate in association with the vasa deferentia, but on their 

 dorsal aspect. 



The Penis (PI. 11. Fig. 1) was attached to the pelvic bones 

 in the region which was essentially the perineum, while the 

 anterior or penile portion of the organ occupied a deep groove 

 placed longitudinally upon the mesial ventral aspect of the 

 post-umbilical portion of the abdominal wall. Within this 

 groove the penis was covered by the skin, the blubber or 

 superficial fatty stratum, the panniculus carnosus muscle, 

 and a strong fibrous membrane or deep fascia. 



The preputial sheath was 15 cm. in length, while the 

 anterior margin of its orifice or slit was 6*5 cm. behind the 

 umbilicus. In relation to the prepuce, the panniculus 

 carnosus muscle was disposed so as to form a powerful 

 sphincter surrounding the preputial orifice, and at the same 

 time to invest the sheath as well as the adjacent hinder 

 portion of the penis, both on their ventral and dorsal aspects. 

 The anterior part of the penis therefore passed through a 

 strongly-developed tube, partly muscular and partly apo- 

 neurotic in character. 



The penis consisted of two corpora cavernosa and a corpus 

 spongiosum. The former were attached to the pelvic 

 bones, while the urethra travelled through the latter. 



Each corpus cavernosum was a bulky object attached to 

 the entire length of the pelvic bone of its own side, on its 



