a doubtful amphibious Animal of Germany. 253 
are very conspicuous ; one near the intestines, beginning 
from the under edge of the pancreas, and terminating on the 
rectum, after having sent off numerous branches to the bowels : 
the other is the above mentioned branch of the blood vessel of 
the liver; it runs on the opposite edge of the mesentery, parallel 
with the former, giving out numerous branches, some towards 
the bowels, (anastomosing with the former vessel,) others 
towards the neighbouring parts. 
Upon the spine, and strongly fastened to it, lies a viscus, 
which originates in two thin membranous strings in the thorax: 
these strings soon unite into one; in the course of which, lower 
down, appears a glandulous substance, forming innumerable 
small and narrow convolutions, from which several blood 
vessels go off towards the spine. This glandulous substance, 
which is very thin and narrow about the middle of the body, 
grows sensibly larger in its course downwards, and termi- 
nates at last, a little above the beginning of the rectum, in an 
oblong flat viscus, of a glandulous appearance, divided in the 
middle by a shallow longitudinal ridge. It is a little broader 
than the rectum, under which it lies ; it is fastened to the spine, 
and opens at its lower end into the rectum, by a short and 
narrow canal. Its situation and structure led me to suppose it 
to be the kidney. 
There are still two other viscera, somewhat resembling the 
blind intestines in some fishes ; they must not, however, be con- 
founded with them, as they do not belong to the intestines, but 
appear evidently to be the ovaries. They are situated low in 
the belly, one on each side the spine, and seem to originate 
in a blood vessel which runs down the pneumatic bladders, (of 
which I am going to speak,) and a membrane connecting them 
