of the Peruvian Lama. 493 



surface, is smooth, but there likewise are two very considerable 

 portions occupied by rows of cells, which I shall now describe. 



In the larger collection of cells there are sixteen rows, but 

 the rows vary much in length, and, besides, the cells are of vary- 

 ing depth. In some of the rows there are twenty cells, and the 

 depth of each, if the stomachs were distended, may vary from 

 half an inch to about three-fourths. They all open towards the 

 stomach, seem lined by the general mucous membrane of the ca- 

 vity, altered however somewhat in its appearance and probably 

 texture ; the rows are further divided from each other by very 

 powerful bundles of muscular fibres, whilst each pair of cells is 

 separated from those which precede and follow by muscular fi- 

 bres also, which however, as may be observed in the accompany- 

 ing delineations, are much weaker than the powerful muscles 

 which separate and divide the rows of cells from each other. 

 The action of these muscular fibres must be to shut the mouths 

 of the cells, and to form of them at times, it may be presumed, 

 cavities distinct from the general cavity of the stomach. 



The smaller collection of cells is similar in most respects to 

 the larger. There are here twenty rows of cells, but they are 

 much shorter, and the individual cells are obviously much shal- 

 lower. In other respects their structure corresponds to those 

 already described. Two powerful muscular bands lead in such 

 a way from the gullet towards the third stomach, as to enable 

 the animal at will to cause the food, after remastication, to pass 

 at once (by converting the open groove into a complete canal) 

 into the third stomach a structure at least altogether like this 

 is found in the stomachs of the ox, sheep, and camel, and this is 

 the function which anatomists have assigned to it. 



The first stomach communicates with the second by an aper- 

 ture, sufficient to allow the hand to pass through. This second 

 stomach, which is of considerable magnitude, is almost entirely 

 composed of cells, but they are scarcely so deep. They differ also 



3 Q2 



