148 PHYSIOLOGY AT THE FARM. 



in some measure, form rudimentary partitions, so as to divide 

 the cavity into two, three, or four little cells. 



To the right, above and before the second stomach, is the 

 manyplies or psalterium, which in the sheep has the smallest 

 capacity of all the four stomachs. It has less than a third part 

 of the capacity of the second stomach. It communicates with 

 the second stomach by a narrow aperture. It communicates 

 with the gullet. It is in connection with the orifice of the 

 gullet by the sixth part of its circumference. It is this inser- 

 tion into the gullet which constitutes the true origin of the 

 third stomach. At this place are seen to arise two strong 

 ridges, the one in front, the other behind, which are directed 

 from before backwards, and from left to right, passing before 

 the front aperture of the second stomach. The two ridges 

 by their relative position form a species of narrow demi-canal, 

 which proceeds to open into the third stomach, by means of 

 which, when the two borders of the demi-canal cling the one 

 to the other, the aliment, without passing into the second 

 stomach, can directly reach the third stomach. 



The internal surface of the third stomach is overspread with 

 a considerable number of very distinct longitudinal folds differ- 

 ing in size, projecting farther in the middle than anywhere 

 else. These encroach a good deal on the capacity of the cavity, 

 yet they very notably enlarge the extent of its surface. The 

 two surfaces of these folds, as well as their free margin, are 

 beset with triangular indentations, which do not differ from 

 those of the second stomach otherwise than by the very much 

 greater width of the spaces which separate them. Such of 

 these indentations as are in front are much larger than the 

 rest. The indentations that are in the demi-canal are widely 

 distant from one another. By reason of these indentations the 

 third stomach resembles the second. As to the longitudinal 

 folds, they may be very well regarded as decomposed cells. 



