-STRUCTURE AND OFFICE OF THE STOMACir. ig 



not retained in it so aslo be acted on by the different secre- 

 tions. 



This however is not the place to enter into these subjects; 

 the object of the present investigation has been to collect 

 facts in comparative anatomy, that may throw light upon the 

 conversion of the food into chyle, and to abstain as much as 

 possible from all matters of opinion; — no easy forbearance in 

 ^oing over ground, that has given rise to so many theories, and 

 which the mind cannot contemplate, without forming a variety 

 of conjectures. 



The stomach of the truly carnivorous quadruped appears Truly camivo- 

 ., J r ^1 ...uu Ti.i-j '■^"s stomachs 



to be made up of the same parts as the human. In the lynx, resemble the 



tite different structures are more strongly marked, the solvent human. 



glands are more conspicuous, the pyloric portion is more bent, TheJynx. 



which renders the division between it and the cardiac more 



distinct, the muscular coats of the pyloric portion are much 



stronger, and on its internal surface glands are very obvious, 



which are not to be observed in the human. 



The stomachs of some carnivorous animals have glandular Peculiarities in 

 structures peculiar to them; these are in tlie pyloric portion; 

 there arc also similar glands in the stomachs of some grami- 

 nivorous animals, ks has been already explained. The follow- 

 ing may be mentioned as instances of this kind. 



In the lynx, a glandular zone surrounds the orifice of the ^y"^* 

 pylorus. 



In the mole, there is a similar zone. ^ Mole. 



In the stoat, and armadillo, there is a glandular structure ^^°^^ ^"*^ ^^' 



madillo. 

 near the pylorus. 



In the sea otter, there is a glandular structure extending Sea otter, 

 from the pyloric portion into the duodenum, described in a 

 former paper. 



In tracing the gradation from carnivorous quadrupeds to Gradation 

 birds of prey, it would have been natural to expect, that the ro°TbiTtru) 

 bat, which has wings, and lives on animal food, should form l^i^ds of prey. 

 an intermediate link : this, however, is not the case ; the sto- Long-eared 

 mach of the long-eared bat resembles those of small carnivo- 

 rous quadrupeds; that of the vampyre bat, which will be Vampyre. 

 found to live on vegetables, has more the appearance of an 

 intestine, and may, from its form, be mistaken for the 

 C 2 csecum 



