18 



H. W. MARETT TIMS. 



Genito-drin'ary System. 



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

 numerous with a connective tissue packing lietween 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 

 / //' / I '^'"'^^ "^'f ^^^ kidney, there being a 



Epididymis-A-Y-pyr-yi/ Vr^ / / '^'^*^''^t depression in the latter in 



f \ \ \\ II i ^.../.-/-.Testis ^vhich the testis lies. The epidi- 



l/as deFerens dymis lies along the postero-exter- 



/--r-f-- -Uterus jjjjI Ijorder of the testis, the qlobus 



/ I mascuhnus . . "^ . 



major and globus minor being dis- 



SZadder-— \i;.v>;i*iw^\\ IJ _ /' / 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 ba.sal 

 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, aud 

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



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

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

 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 tluoughout life. 



Plackxta. 



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 fa;tal membranes is that given by Sir William Turner. 



