BISON AMERICANUS. 153 



passes between one of the turns of the colon and the caecum. This 

 part is about a foot and a half in length and about 10 inches round. 

 The colon at its beginning is a little folded upon itself, and is there 

 largest : from thence it passes upwards, becoming smaller, and makes 

 six spiral turns upon itself; then runs in between the two lamellae of 

 the mesentery, half-way between its root and the intestine, towards the 

 left, and upwards ; then it crosses the fore-part of the mesentery, is 

 attached to it, making a fold upon itself in the mesoduodenum, still 

 continues to cross, and is attached to the posterior lamellae of the epi- 

 ploon ; it then gets to the left of the mesentery, just above the begin- 

 ning of the jejunum, then turns down to the rectum which has a 

 mesentery 1 . 



The pancreas lies across the spine behind these parts, having no little 

 pancreas lying in the curve of the duodenum. 



The liver, lying principally on the right side, is flat and close to the 

 diaphragm ; it has a fissure in its lower edge dividing it into two. The 

 gall-bladder is attached to the right of that fissure ; and is very small. 

 The ductus cysticus passes up from the hepatic duct through the sub- 

 stance of the liver to the gall-bladder, and these ducts enter the 

 duodenum at the part of the attachment that we mentioned above ; a 

 small vessel passes up from the porta to the gall-bladder, which has the 

 appearance of the ductus cysticus. 



The vena cava passes along the thick posterior portion and left edge 

 of the liver, in its way to the diaphragm. There can hardly be said to 

 be any of the liver to the left of this. 



The pancreatic duct passes into the duodenum just before the gut 

 makes the turn up to cross the spine. 



The right kidney 2 is the highest, pretty firmly connected to the loins : 

 the left is very loose. There are two azygos veins, and a seeming 

 remnant of the thymus gland. • 



The lungs on the right side are partially divided into four lobes ; on 

 the left side into three. The testicles are pendulous. There are four 

 nipples. There is a gland below the eye, where there is a duct not 

 covered with hair ; and there are ducts opening for the mucus which is 

 there secreted, as in the deer. 



[Family B OVID A3.] 



The Bonassus [Bison Americanus], 

 It has four nipples like a cow. The inside of the lips has the same 



1 [Home, Comp. Anat. i. p. 462.] 2 [Hunt. Prep. No. 1237.] 



