200 RODENTIA. 



The liver has three lobes besides the lobulus Spigelii. There is a 

 gall-bladder. The right kidney is much higher than the left. There 

 is a pigmentum nigrum. The muscles are as dark coloured as in the 

 common hare. 



There was a good deal of fat about the kidneys, the aorta, and down 

 to the pelvis ; also about the testicles, &c, which was white and pretty 

 soft. The same is found in the common hare. The male parts of 

 generation are the same as in the common hare. 



The Rabbit \_Lepus cuniculus], compared with the description of 



the Hare l . 



The oesophagus is the same. ' The stomach is very similar. In the 

 rabbit the stomach becomes very thick in its coats just before it termi- 

 nates in the pylorus. The duodenum, as it passes down, is attached to 

 a turn of the colon ; it then becomes loose. The ileum passes between 

 the caecum and the first turn of the colon for nearly a foot, and where 

 it enters it becomes larger, or swells out into a bag. 



The caecum is about 18 inches long, making nearly two spiral turns 

 upon itself, or scrolls, the base being the largest curve or circumference 

 of the spiral. The first part or apex is small, becoming larger and 

 larger in its termination : it is for five or six inches a smooth body, 

 but comes to have a spiral indentation l'unning round and round it to 

 the beginning of the colon. 



The colon begins immediately to bend back in the contrary direction 

 to the ileum, passing back between the two turns of the caecum, follow- 

 ing the last part of the ileum; and, when got nearly as far as the 

 beginning of the caecum, it passes up behind the spiral turns of that 

 gut, adhering to them, making there a band. When the colon has got 

 to the upper part of these turns, it becomes invisible, passing a little 

 to the right, and is next seen on the right of the mesentery behind the 

 ascending part of the caecum, where it is making a fold or turn ; it then 

 joins the duodenum for some way, as it passes up and crosses the body, 

 before the root of the mesentery. When it has got to the left it makes 

 a short fold, and passes down to the pelvis. The colon at the beginning 

 has two bands, viz. one at the mesocolon, the other opposite, but the 

 opposite is lost in the mesocolon band about 7 or 8 inches from the 

 beginning of the colon ; and, where the colon is passing up behind the 

 close turns of the caecum, the band terminates; and it is a smooth 

 intestine afterwards through the whole length. 



1 [The osteology of the rabhit is shown in the Hunterian specimens Nos. 1950 — 

 1961. The ear, injected, is No. 1614, Physiol. Series; the eyes are ftos. 1725, 

 1787.] 



