18 



H. AT. MARETT TIMS. 



Epididymis 



--Uterus 

 masculinus 



GENITO-URINARY SYSTEM. 



The kidneys, as already stated, are multilobulated, the lobules being small and 

 numerous with a connective tissue packing between the sulci. On either side was a 

 single ureter, each of which opened separately into the base of the bladder. 



I was unable to distinguish the sexes in the earlier stages by their external 

 character, and it so happened that the four specimens which I dissected all turned out 

 to be males. Whether this was simply bad fortune or whether it indicates that the 

 number of males born preponderates over females I am unable to say. 



The testes develop in relation to the kidney, and when recognisable as distinct 



organs, they lie at the posterior 

 end of the kidney, there being a 

 distinct depression in the latter in 

 Testis which the testis lies. The epidi- 



^_ - Vas deFerens dymis lies along the postero-exter- 



\kL\/-\/r-/-- Uterus nal border of the testis, the globus 



. . ,. ,. 



major and globus minor being dis- 



tinctly marked. The vas deferens 

 leaves the hinder end of the 

 epididymis and runs backward for 

 a short distance and then bends 

 sharply inwards towards the middle 

 line. The two vasa enter the basal 



angles of an elongated hollow organ, which I think must be regarded as an unusually 

 large uterus masculinus (see fig. above). Indeed, when I first saw this structure lying 

 between the bladder and rectum I made sure that I was dealing with an ordinary 

 female uterus. I found, however, that it opened into the neck of the bladder, and 

 examination of the testis proved that my first opinion was incorrect. 



The sudden bend toward the middle line made by the vas deferens appears to be 

 due to its being held in position by a delicate cord-like structure, which I at first 

 took to be the round ligament of the uterus, but which can be no other than the 

 gubernaculum testis passing forward from the inguinal canal. 



The descent of the testis appears to take place during the latter half of intra- 

 uterine life, for in the older specimens it already lies in the inguinal canal, the position 



it retains throughout life. 



PLACENTA. 



The placenta of seals has been described in more or less detail by Alessandrini, 

 Rosenthal, Eschricht and Barkow, but the most detailed account of its structure and 

 of the arrangement of the foetal membranes is that given by Sir William Turner. 



