ALIMENTARY CANAL OF BRUT A. 447 



middle of the cavity converge. The muscular coat is thin at the 

 wide cardiac end, but attains a thickness of 2 lines near the 

 pylorus, and here on each side there is a tendinous spot externally. 

 A semilunar ridge defines the lower part of the pylorus ; from 

 the upper part depends a protuberance : this valvular structure 

 resembles that in the Seal. Beyond the pylorus is a well-marked 

 zone of racemose glands. In Dasypvs 6-cinctus I found a greater 

 proportion of the stomach to the left of the cardia : the other 

 characters were repeated. The duodenum is dilated at its com- 

 mencement and is suspended on a fold of peritoneum which 

 becomes narrower as the gut descends : after crossing the spine 

 the fold again expands to form the mesentery of the rest of the 

 intestine. After a length of from 12 to 18 feet the gut suddenly 

 expands, and here, in D. peba, the small intestine seems to enter, 

 forming a narrow circular fold within, the larger intestine. The 

 former are smooth internally, the latter shows a few longitudinal 

 rugae. In Dasypus 6-cinctus the large intestine expands into 

 a pair of short, wide pouches, one on each side the insertion of 

 the ileum. The terminal orifice of the ileum is a slit with tumid 

 margins on the middle of the ridge between the two ca3ca. The 



o o 



length of the intestinal canal is 10 feet. 1 



In Orycteropus the lining membrane of the oesophagus is smooth : 

 the tube terminates at the middle of the lesser curvature of the 

 stomach : the lining membrane of the large cardiac sac is disposed 

 in coarse reticulate folds, which become longitudinal toward the 

 pyloric end : this is pyriform, with a muscular coat increasing to 

 a thickness of 8 lines : the mucous coat showing strong rugae, 

 with an epithelium. The small intestines are of unwonted length 

 in the present genus, about 37 feet : the lining membrane is with- 

 out folds, but is beset with long and fine villi, and shows five or six 

 elliptic patches of agminate glands in the ileum. The caecum is 

 between 4 and 5 inches in length ; the colon about 8 feet long, 

 and about 4 inches in circumference at the commencement. 2 



In the Pangolins (Manis) the distinction between the cardiac 

 and pyloric portions of the stomach is still more marked : the 

 latter has acquired a greater accession of muscular fibres, and 

 their tendinous centres are externally more conspicuous : the 

 structure is made the more gizzard-like by its thick papillose 

 cuticular lining. At the middle of the great curvature is a mass 

 of complex glandular follicles, the ducts of which intercommuni- 

 cate and terminate by a common orifice in the cavity of the 

 stomach. 3 The valvular protuberance above the pylorus is large. 



1 cxxvin". p. 155. 2 cxox". p. 16. 3 CXLVII". p. 182, No. 590 c. 



