236 RODENTIA. 



itself to the back or loins below the duodenum. The jejunum and 

 ileum are loose guts, as common, but are very short. The ileum passes 

 into the colon, which is pretty long. The caecum makes a close spiral 

 turn upon itself, has many transverse foldings in its inner coats, which 

 make a kind of valves within, with sulci between each fold, as in the 

 human colon. The colon passes a little way up the right attached to 

 the mesentery, being much of the same size and structure with the 

 caecum ; it then makes a long fold upon itself, which lies loose in the 

 cavity of the abdomen : this fold, as it passes back to where it set out, 

 becomes smaller, and more even on its surface : it crosses the spine 

 before the root of the mesentery, close to it, and adhering to it by a 

 pretty broad surface ; it then passes down the back to the pelvis in a 

 straight line. The anus is close above the vagina, and does not run so 

 far under the tail as in the rat. 



The liver is divided into four lobes, the two left being the largest ; 

 the second from the left has a large fissure in it, in which lies the gall- 

 bladder, and the ligamentum rotundum ; the Spigelian lobe is very 

 small, and is a continuation of the right lobe. 



The spleen is a long small body, lying along the great curve of the 

 stomach in a doubling of epiploon : it is thickest at its left and upper 

 end, becoming smaller to the other. The kidneys are conglobate, 

 [having] one mammilla. The heart is flat ; the right ventricle comes 

 as low as the left, and is not so oblique or twisted round the left as in 

 many other animals. There are two superior venae cavae. The lungs 

 on the left side are divided into three lobes, the lower of which has a 

 small lobe at its root. On the right side there are three lobes, besides 

 the lobe between the heart and diaphragm. 



The External Parts of Generation. — The clitoris stands or hangs on 

 the outside of the vagina, like a nipple, and is covered by a prepuce ; 

 the whole being like a rat's. Just above the clitoris is the vagina : it 

 is an opening beginning at once, without any external rising, similar to 

 the rat's. The vagina is pretty long, and is veiy rugous near the 

 beginning, which is penniform, the plumes diverging upwards : it 

 becomes smooth near the os tincae. There are two ora tincae, which 

 are placed on one common prominence, as in the hare, rabbit, &c, 

 which are the openings of the two uteri or comua. These pass up the 

 loins to near the kidneys. The ovaria are oblong bodies ; the capsula 

 is only a thin membrane, a little hollowed on that side next to the 

 ovarium, with a Fallopian tube running against it 1 . 



1 [Hunt, Prep. No. 274.:..] 



