SCIURUS CINEREUS. 243 



The kidneys are conglobate, the right being rather the highest. 



The anus is a considerable way from the tail, is very little projecting, 

 but the rectum cannot be said to terminate at the verge of the anus ; 

 but about three-quarters of an inch higher up, that lower part seems 

 common to the anus and to a glandular apparatus whose ducts open into 

 it. It is something like the common vagina to the bladder and uterus, 

 or the common passage to the rectum and oviduct, in fowls. These 

 ducts in many of this class open externally, as in the rabbit, hare, &c. : 

 also in the pikito [Bathyergus, p. 235] from the Cape of Good Hope, 

 brought home by Mr. Banks, which is a very different kind of animal. 



The external vulva is below the anus; it projects but little: the 

 com m on skin on both terminates all at once at the verge of both. The 

 common and the proper vagina are almost one undistinguishable canal, 

 with flat longitudinal rugae : the urethra opens on the largest, which 

 terminates quickly in the common vagina. At the os tincse the uterus 

 is hard and closed a little : there are two ora tinea?, which are very 

 irregular : the two horns are as in a rabbit 1 . 



Male Parts. — The opening of the prepuce is more than an inch from 

 the anus. The penis is retromingent. The testes are very small, and 

 rather longer for their thickness than in most other animals : they lie 

 in the rings of the abdominal muscles, and can be pushed with ease 

 either into the abdomen or entirely out, as occasion serves : the tunica 

 vaginalis will admit of a total inversion into the cavity of the abdomen, 

 as in the rat, mouse, and mole. The spermatic artery passes down the 

 loins in a broad membrane or mesospermatica, which is a doubling of 

 the peritoneum. This is very fat in some. 



[Family SCIURIDjE.~\ 



The Virginia Grey Squirrel [Sciurus cinereus, Linn. 2 ]. 



The stomach is short and thick ; the thick end is not far from the 

 oesophagus, and is very obtuse : the small end is bent upon the small 

 curve of the stomach, so that this small curve is very short, and the two 

 orifices are very near one another : it is not made, like the rat's, thinner 

 in its coats at one end than at the other. 



The beginning of the duodenum is nearer the left, on account of the 

 fold of the small end of the stomach : it passes pretty near the liver in 



1 [Hunt. Prep. No. 2748. The uteri are connected together for about an inch 

 before they diverge towards the ovaria,] 



2 [Parts of the skeleton of this squirrel are numbered 2287 — 2289, Hunt. Osteol. 

 Series. The fore- and hind-foot form the wet-preparation, No. 1415.] 



r2 



