222 RODENTIA. 



caecum is a foot long, largest at the entrance of the ileum, and has three 

 longitudinal bands, as in the guinea-pig 1 , which are continued on to the 

 colon, hut become fainter and fainter onwards, and at the rectum they 

 are hardly perceivable : it lies coiled up in the lower part of the ab- 

 domen. The colon is smaller than the caecum, as in the guinea-pig ; 

 and, as it passes up the right side, it is attached to the duodenum, as 

 was mentioned before ; it then bends down a little upon itself for near 

 a foot in length ; something similar to that in the guinea-pig, but not 

 exactly of that kind, just before it passes across the abdomen ; and the 

 piece of the colon that makes the doubling is half an inch distant, with 

 a mesocolon common to both ; it then passes a little more to the left, 

 and becomes more attached to the root of the mesentery ; from thence 

 to the left and all the way down, it is a loose intestine like the jejunum, 

 and there is a good deal of it having a loose mesocolon ; it makes 

 another fold, but not so long as the former, and then goes to form the 

 rectum. 



The spleen is attached to the stomach and to the last fold of the colon 

 by the epiploon ; it is small, and rather a rounded flat body than an 

 oblong one: it was small, but oblong, in another of the same kind. 

 The pancreas lies in that epiploon which attaches the spleen to the colon 

 on the left side, and to the root of the mesentery on the right side. It 

 is very thin, and its duct enters the gut beyond the attachment of the 

 duodenum to the colon, which is a good way from the pylorus. 



The liver is divided into three lobes of nearly equal size ; the middle 

 one has a large fissure in it for the umbilical vein : the lobulus Spigelii 

 is very small, and is a kind of continuation of the right lobe : whether this 

 right lobe was only one originally, or two or three united, I am not 

 quite certain, because it was irregular, and had marks of union upon it. 

 In another, which was perfectly sound, it was divided into two, so that 

 there were four lobes, besides the lobulus Spigelii. The gall-bladder 

 was fixed to the third lobe from the right or the second from the left : 

 it has hardly any length of ductus cysticus. The ductus communis is 

 very large, and is a great deal honeycombed on its internal surface. 

 The pori biliarii are likewise very large, and the largest of them enters 

 the ductus communis between the entrance of the ductus cysticus and 

 the duodenum. The ductus communis enters the gut close to the pylorus. 

 In another specimen there was no gall-bladder. 



The epiploon is broad and fat, covering all the guts, <fcc. : the little 

 epiploon is tucked down to the concave surface of the left lobe of the liver. 



The kidneys are oblong, conglobate, dark bodies, rather round and 



1 [Home, Cornp. Anat. i. p. 449.] 



