Biological Papers. 167 



about one-third of the distance from the pyloric end. This was 

 due to a sort of a valve or partition on the inside. 



A reddish-looking gland three inches long and one inch 

 thick was apparently spliced onto the stomach at the cardiac 

 end where the esophagus enters. It had about a dozen little 

 mouth-like openings into the stomach. Each opening and its 

 surrounding lips was about as large as the end of a lead-pencil. 



The csecum was twenty-two inches long measured through 

 the center portion, and twenty-five inches measured on the 

 outside, and three and one-half inches wide at its larger or 

 attached end; a foot from this end it was three inches wide. 

 It would hold about three quarts, or nearly twice as much as 

 the stomach. 



The liver had six principal lobes and one or two smaller 

 pieces, due to fissures in the lobes. The three larger lobes 

 were each about seven inches long and from three to three and 

 a half inches wide. The smaller lobes ranged from three to 

 five inches long. In a general way the gall was one by two 

 inches in size. The kidneys were shaped very much like a 

 short Lima bean, and in size were three inches long, two and 

 one-half inches wide and about an inch thick in the center. 

 The spleen was four inches long by three-eighths of an inch 

 in diameter, was round, and was dark red in appearance. The 

 heart was about three inches long and two and one-half inches 

 in diameter at its large end. 



We laid the animal on its back and dissected out the cas- 

 toreum or bark glands and the oil-glands or sacks. The glands 

 occupy a position between the pubis and the scaly part of the 

 tail. This space is seven or eight inches long and nearly as 

 wide, and covered with hair the same as the rest of the body. 

 The bark glands were of a yellowish or light-brownish tinge in 

 color. They were about five inches long and three in width. 

 They were under the skin and some fat and muscular fascia 

 and rested just back of the pubis. Just back of these bark 

 glands and connected with them are the two oil-glands or 

 sacks. They were about as long as the bark glands, but not 

 much over an inch in diameter. Trappers prize the bark 

 glands very highly for making a scent-bait for trapping other 

 beavers. The oil-glands are also used in making a bait for 

 trapping otters. The testicles were situated in front of the 

 bark glands and rested one on either side and about two and 

 one-half inches from the union of the pubic bones. In size 

 they were about two by one inches. 



