143 



cular and mucous membranes. A precisely similar Btructure guards 

 the pyloric aperture of the stomach ofthe Seal and that of the Llama. 

 From the position of this projection with respect to the semilunar 

 fold below, the pylorus has the form of a semicircular aperture with 

 the concavity upwards. This valvular structure is not alluded 

 to by Sir Edward Home in his description of the stomach of the 

 Nine-banded Armadillo, but he describes a zone of glands surround- 

 ing the orifice of the pylorus. 



" The duodenum is enlarged at its commencement, and is con- 

 nected by a loose process oi peritoneum, which becomes narrower as 

 the gut descends, and is continued from its lowest part upon the 

 right kidney ; the duodenum then crosses the spine and becomes a 

 loose intestine. The small intestines contained a little dark-coloured 

 matter ; they were smooth on the inside : their whole length was 

 18 feet. They enter the colon in the šame way as in the Crocodile : 

 that gut suddenly expanding. There is a small circular production 

 of the inner membrane, where the small intestine is inserted, but it 

 seems incapable of forming an effectual valve. The inner membrane 

 of the colon was raised Into a few small longitudinal rug(P. The 

 foEces were of an oval form, about 9 lines in length, and tolerably 

 coherent. Two follicles open exteriorly near the verge of the anus. 



" The liver is divided into four lobes and a lohulus Spigelii. The 

 third from the right is the largest, and in this are lodged the gall- 

 bladder, and the remains ofthe umbilical chord. The duetus choledo- 

 chus enters the duodenum two inches from Ūie pylorus. 'Yhe pancreas 

 is a thick mass, 4 inches in length, and extended as usual behind the 

 stomach from the spleen to the duodenum. The spleen is a simple 

 elongated trihedral body, 2^ inches in length. 



«' The kidneys are conglobate and simple, i. e. terminating in a 

 single papiliu. The supra-renal glands are half an inch in length, 

 of a yellow colour, loosely connected with the kidneys, but closely 

 attached to the coats of the contiguous large veins. 



" In the heart the right ventricle terminated one third from the 

 apex, and stood out from the left likę an appendage to it ; an appear- 

 ance, however, that was chiefly owing to its being distended with 

 blood, while the other cavity ivascontracted. The arteries are given 

 ofF from the arch of the aorta, precisely as in the human subject. 

 The lungs also have a similar correspondence in the number and 

 proportions of their lobes. 



" The tongue is of a trihedral elongated form ; it is half an inch 

 broad at the root, and from thence gradually tapers to the extre- 

 mity : its superior surface is convex, transversely wrinkled and finely 

 papillose; at about an inch from the root are two fossulate papillcE 

 on the šame transverse line, and behind these a mesial furrow extend- 

 ing to the epiglottis. There is a fold of membrane on each side of 

 the JrcEnum tinguce, wh\ch is continued iorv/arčiS to Ūie symphysis 

 menti; and external to these folds are tvventy filamentary processes, 

 ten on each side, about 2 lines in length, which appear to be elon- 

 gated follicles. The soft palate extends to the base of the tongue ; 

 on its anterior surface are two Httte cavities containing the tonsils. 



