18 H. W. MARETT TIMS. 
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 uflable 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 
Epididymis---\-~\-" wn . ‘ion 2 
pete : ae ae which the testis lies. The epidi- 
-Vas deferens ‘ymis lies along the postero-exter- 
pee nal border of the testis, the globus 
masculinus 
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. 
Bladder --- © yh 
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. 
