175 



"The duodenum was found to commence with a large dilatation 

 or sacculus, projecting towards the asophagus likę a cacum; in which 

 respect it resembles Calogenus as described by Sir E. Home. In 

 Capromys, Anmma, and Dasyprocta a similar dilatation, though not 

 so considerable, has also been noticed. In circumference at this part 

 the duodenum measured 4-į- inches ; the decrease is gradual, and where 

 the bUiary duct enters the circumference is 3 inches ; a little di- 

 stance below this it is 2-į-. To follow the natūrai course of this intes- 

 tine was out of my power ; it has a mesentery, however, through 

 its ■whole extent. 



"The totai length of the small intestines was 16 feet 4 inches, 

 and their mean circumference l-l-. 



" The ctEcum was of large size, making a circular turn at its base 

 and gradually diminishing in volume as it pi'oceeded. It was 

 puckered into sacculi by two muscular bands, one on each side ; 

 whįch were not however traceable quite to its extremity, but ^ere 

 tolerably strong in its wide basai part. In its general figure the 

 cacum had no unapt resemblance to a ram's hom. In length it 

 measured about I foot 10 inches, its greatest circumference 8 inches. 



" The ileum terminated in a sort of sacculus at the base of the colon, 

 beyond which projected the round head of the cacum : the valve in- 

 dicating the separation of the cacum from the colon is very ap- 

 parent in the dried preparation. 



"The colon began large, but gradually b ecamenarrow; onleaving 

 the cacum it was slightly sacculated for a short distance, but this 

 appearance was speedilylost : its mean circumference was 2-1 inches. 

 The commencement of the colon was not only somewhat larger than 

 the succeeding portion, but made an abrupt turn from the cacum, 

 and after a course of 1 foot 5 inches suddenly folded upon itself, the 

 reflected length running down for the distance of 1 1 inches, -^hen it 

 turned suddenly back again, but did not adhere so closely to the pre- 

 vious fold, as that did to the first length ; it then became very small, 

 and soon dipped down to constitute the rectum. The whole of this 

 long loose fold reminded me of the duodenum of Birds. A similar 

 structure is recorded by Mr. Owen in his notes on the dissection of 

 Capromys Fournerii, as existing in that animal. It was near the end 

 of the first loose fold, as also in Capromys, that the f aces began to 

 assume a solid form in separate oval masses. The totai length of 

 the large intestines was 4 feet 4 inches. 



" The kidneys were of an oval form, and very soft in their structure ; 

 their surface, the tunic being removed, presented a granular appear- 

 ance. The two portions were very distinct. The pelvis was small ; 

 the papiliu single. The right kidney was somewhat higher than the 

 left. The length of each was 2 inches, the breadth 1-į-. The supra- 

 renal glands were long and rounded, of a greyish yeIlow externally; 

 but their internal structure \vas likę soft liver : each had a small 

 cavity within. ITieir length was 1 inch. Their situation was me- 

 siad of the upper extremity of each kidney. 



" The lungs were of small volume, and consisted of three lobes 

 of nearly equal size, and one very small lobe on the right ; and of 

 three lobes on the left side. 



