Miscellaneous. 381 



passed longitudinally along the stomach, contracting the greater 

 curve into sacculi, especially at the constricted portion. The length 

 of the (esophagus within the abdomen was one inch and a quarter. 



The length of the small intestines was very great, the measure- 

 ment being 21 feet 8 inches. 



The c(Bcum was large, irregularly , multitudinously , but not deeply 

 sacculated ; in form it was gently conical, terminating in a subacute 

 apex ; its length 2 feet 4 inches, its basal circumference about 7 

 inches. When blown up it formed a spiral turn and a half. The 

 large intestines at their commencement were about 7 inches in circum- 

 ference, the decrease being gradual. The lining membrane of the 

 colon formed a series of regular longitudinal striie, gradually disap- 

 pearing as the intestine narrowed, until at length they finally disap- 

 peared. The colon in its course followed the circular sweep of the 

 CiBCum to which it was attached by a riband of mesentery 1^ inch 

 in breadth. 



At about two feet from its origin the colon merges into a flat layer 

 of circular folds, the intestine making four distinct gyrations ; from 

 this part to the anus the intestine measured 9 feet 3 inches. 



The circular fold above noticed is analogous to the long loose 

 fold observed in the same parts of the intestine in other Rodentia, 

 as the Coy pus, and Capromys, and which is noticed in the respective 

 accounts of the dissection of those animals in the Zoological Pro- 

 ceedings. 



The lungs consisted of three right and two left lobes. The 

 heart was round, and firm in texture, the left ventricle being very 

 stout ; the apex exhibited a slight tendency to a bifid figure. The 

 aorta at its arch sent off first an arteria innominata, which divided 

 into a right subclavian, and a right and a left carotid ; then secondly, 

 at a quarter of an inch further, a left subclavian, in an undivided 

 condition. 



The generative organs agreed closely with those of the Acouchi. 



The tongue was S^ inches long, fleshy, rounded at the tip ; the 

 upper surface villose, with fine close hairy papill<s ; at its base were 

 numerous, large, mucous follicles. 



MISCELLANEOUS. 



LARUS JACKSOmi, JACKSOn's GULL. 



Mr. Couch, in his lately published ' Fauna of Cornwall,' has intro- 

 duced a species of Larus under the above name as new to science. 



