108 DR. EMBLETON ON THE TWO 



Stomach, of rather simple form, like others of the Rodent family, 

 larger curvature very great, lesser extremely small, as the cardia 

 and pylorus lie very near together; left end of stomach a good 

 deal produced, pylorus not strongly marked outside. Greatest 

 length of stomach, when moderately inflated, 2^ inches; greatest 

 breadth, 1^ inch. The left end of the stomach is lined by cuticle, 

 and the edge of this cuticle projects about \ inch, all round into 

 the cavity of stomach, marking off the cardiac |,from the pyloric \; 

 it surrounds the cardiac orifice, and projects towards the pylorus, 

 along the lesser curve of the stomach, for rather more than \ inch, 

 in the form of a small spade-shaped flap. Surface of cardiac part 

 of stomach white, and rather warty looking, cuticle easily detached, 

 showing a smooth white surface beneath. Pyloric part of stomach, 

 lined by epithelium, red, highly vascular, delicate and rugose. 



JSmalli7itestme coiled a good deal, but smooth, and pretty uniform 

 in size, measures 3 feet 1 inch long, diameter about tu inch. 

 Puct. hepaticus enters duodenum at about 1^ inch below pylorus, 

 mucous membrane of this part of intestine rather obscurely 

 reticular and villous. 



Large intestine 9^ inches long, length of coecum, along greater 

 curve, nearly 3 inches. Total length of alimentary canal, about 

 4: feet. Diameter of colon, at 2 inches below coecum, 1;^ inch. The 

 coecum is curved almost in a circle round the termination of the 

 small intestine, it is by far the most capacious part of the canal 

 below the stomach. Where the ilium joins the colon, the latter 

 becomes dilated, and beyond the junction the coecum widens out 

 to I inch diameter, it then bends at once upon itself, and ends 

 in a blunt cul de sac that projects about 1 inch beyond the entrance 

 of the ilium into the colon. This latter part is provided with two 

 series of fine projecting folds of the mucous membrane, obliquely 

 arranged, one on each side of the tube, these colic valvulse con- 

 niventes are broadest at their middle, and fade gradually away 

 towards each end ; thus the two series are separated by two plain 

 lines running along the intestinal wall, one of these corresponds to 

 the attachment of the mesentery, the other to the opposite part of 

 the wall of the tube. There are about two dozen folds in each series. 

 The faeces in the colon are are of a greenish black hue, and become 



