420 DR. M. WATSON ON THE MALE L^P r - 16, 



tissue, which is of considerahle thickness where it forms the bulh, but 

 is thin elsewhere. Opening into the bulb are the ducts of Cowper's 

 glands. 



Testicles and Vasa deferentia. — The testicles are lodged in the 

 non-pendulous scrotum, which is divided into two distinct compart- 

 ments by a median septum. Each compartment is lined by a tunica 

 vaginalis, which is reflected over the testicle. The cavity of the sac 

 is continuous at the abdominal ring with that of the peritoneum, the 

 communication between them remaining pervious. The testicle is 

 oval in form, and measures 1| inch in length. The epididymis lies 

 along its lower side, and is expanded above and below to form the 

 globus major and minor. The latter is nearly as large as the former ; 

 and the so-called body of the epididymis is consequently reduced to 

 a mere rudiment. The vas deferens, continuous with the globus 

 minor, passes through the inguinal canal, enters the pelvic cavity, 

 where it lies between the layers of the superior ligament of the 

 bladder, and finally sinks into the muscular wall of the membranous 

 portion of the urethra to terminate along with its fellow on the floor 

 of the vesicula prostatica as already described. There are no vesi- 

 culse seminales. 



Cowpers Glands. — These are two in number and of large size. 

 Each is placed alongside of the membranous portion of the urethra, 

 in the interval between the levator ani and ischio-cavernosus muscles. 

 Each gland is pyriform, and measures 1| inch in length, and § 

 of an inch in greatest breadth. The base is directed forward ; and 

 from the apex is given off a duct ^ of an inch in length, which 

 opens into the roof of the bulbous portion of the urethra. The 

 glands are solid ; and each is provided with a capsule of pale muscular 

 fibres. 



Penis. — This organ is composed of two corpora cavernosa together 

 with a corpus spongiosum. The former consist of two bands of 

 erectile tissue flattened from side to side as in the clitoris of the 

 female, and united along the middle line. Each is attached to the 

 ischium just in front of the tuberosity of that bone, to form the crus, 

 and unites with its fellow opposite the posterior extremity of the 

 pubic symphysis. The corpus spougiosum is perforated by the 

 urethral canal, and expands anteriorly and posteriorly to form the 

 glaus and the bulb. With the exception of these portions, this mass 

 of erectile tissue is thin and contributes no great thickness to the 

 wall of the urethra. The bulb is large and prominent, and is in- 

 vested by the fibres of the bulbo-cavernosi muscles. The corpus 

 spongiosum of the male therefore differs from the corresponding 

 structure in the female, inasmuch as in the latter this body is divided 

 into two lateral halves which are situated altogether above the urino- 

 genital canal, whilst in the former they have coalesced to form a 



which open into a little recess on each side of the utriculus. As this animal 

 was known to be at least twenty-four years of age, whilst my specimen was not 

 adult, it is possible that by reason of their small size the prostate glands of the 

 latter may have escaped my observation. In Mr. Flower's specimen the other 

 generative glands were each twice as large as in my own. 



