120 Proceedings of the Royal Physical Society. 



intestinal pressure, but one immediately to the mesial side 

 of the mesorchium resulted from pressure of the epididymis, 

 which possessed its own peritoneal investment distinct 

 from the mesorchium, and therefore showed a certain amount 

 of mobility. The general form of the testis was thus pris- 

 matic, with rounded angles and slightly pointed ends. The 

 hinder ends of the testes were slightly nearer to each other 

 than their front ends. It should be specially noted that the 

 hinder end of each testis extended backwards in relation to 

 the ventral wall of the abdomen external to the urinary 

 bladder and the pelvic cavity, so as almost to reach the level 

 of the anterior end of the innominate or pelvic bone. Pro- 

 longed still further backwards between the approximating 

 dorsal and ventral walls of the abdomen, and still external 

 to the innominate bone, there was on each side of the body a 

 digital peritoneal recess of considerable morphological import- 

 ance. This recess extended to a short distance behind the 

 anterior end of the innominate bone. At the ventro-lateral 

 or external aspect of the hinder end of each testis a strong, 

 flat, fibrous band was found. This band was continuous 

 with the tunica albuginea testis, and escaped from the 

 mesorchium at its hinder end. Thereafter it was directed 

 inwards and backwards, and becoming fused with the deep 

 surface of the aponeurosis of the transversalis abdominis 

 muscle, it reached a bony attachment into the anterior end 

 of the outer surface of the innominate bone (pubis). Appar- 

 ently, therefore, this band may be regarded as homologous 

 with the gubernaculum testis. A bulky plexus of blood- 

 vessels occupied the re-entrant lateral angle between the 

 dorsal and ventral walls of the hinder part of the abdomen, 

 external and posterior to the position occupied by the testis. 

 This mass of vessels covered and obscured the convoluted 

 epididymis and vas deferens. 



Seminal ducts emerged from the testis along the area 

 uncovered by peritoneum, viz., the hilum or base of the 

 mesorchium. These joined the very finely convoluted epidi- 

 dymis which formed a definite projection on the mesial side 

 of the mesorchium. The fine convolutions of the epididymis 

 occupied the whole length of the mesorchial attachment. At 



