BLOOD-VASCULAR SYSTEM, ETC., OF AMIURUS CATUS. 443 
‘does not appear to present any peculiarities, and nothing further 
need be said regarding it. 
THE GENITAL ORGANS. 
I have not studied any details in connection with these organs, and 
will merely note a few of their general features. They are paired 
glands, 65 mm. long, lying along the ventral surface of the kidney 
and posterior part of the air-bladder, and attached by a median con- 
tinuation of the peritoneum which surrounds them, to the mesentery 
close to its junction to the peritoneum covering the kidney and air- 
bladder. 
* The ovaries of the female are cylindrical in form, bluntly pointed 
at both ends. The ova-duct is a large passage in the centre around 
which the ova are developed from the entire wall, but more abun- 
dantly along the median side. The ova, seen through the thin trans- 
parent membrane of the organ, give it a bright yellow color. 
The testes are greyish-white in color, flattened in form, with a 
straight median edge along which the vas deferens lies, while the 
lateral edge is broken into a great many small lobes. 
The genital ducts join to form a common median duct. In the 
female this opens on a papilla between the urinary opening and the 
vent, but in the male it joins the urethra and opens with it on a 
common uro-genital papilla. 
These papill, upon which the openings of intestine and the urinary 
and genital-ducts are situated, arise in a longitudinal median depres- 
sion, 15mm. in length and very shallow. The papille and the sur- 
rounding depression are remarkable for the richness of their blood 
supply. 
The above arrangement of the uro-genital ducts is exactly similar 
to that described by Wiedersheim as most common among the Tele- 
ostei. 
The blood supply to these organs has already been referred to. The 
trunk stems run in the median line, giving off, at intervals, lateral 
branches, which run parallel to one another across the attaching peri- 
toneum to the glands. The vessels divide into a dorsal and ventral 
stem which supplies or drains respectively these halves of the organs. 
31 
