114 CETACEA. 



Where the second stomach begins, the cuticle of the first terminates. 

 The whole of the inside of this stomach is thrown into irregular rugae, 

 appearing like a large irregular honeycomb ; [the cells of] which are 

 very deep in many places, and the folds and risings are very thick and 

 massy in many places 1 : this stomach terminates or opens, by a con- 

 tracted orifice, into the third, which is round, but does not seem valvular. 

 The third stomach is. by much the smallest, and would only appear to 

 be a passage of about 4 or 5 inches in length, between the second and 

 the next, or what may be called the third, but which I call the fourth : 

 it has no particular structure on the inside ; it terminates on its right 

 in the fourth, by nearly as large an opening as its beginning. The 

 fourth is a pretty large bag, but not nearly so large as either the first 

 or the second. It is not round, but as if flattened between the second 

 and fifth, the third being hardly anything else than a passage. The 

 internal surface is even, but villous 2 . It opens on its right into the 

 fifth by a smaller opening than the one which entered it, which is 

 round. The fifth stomach is round; its coats are thinner than the 

 former, having an even inner surface when distended 3 ; it is tinged 

 with bile, and on the right it terminates in the duodenum : the pylorus 

 is hardly valvular 4 . 



The duodenum 5 passes down on the right side, very much as in the 

 human, but is more exposed, because the colon does not cross it as in 

 the human, lying first on the right kidney, and bending soon to the left 

 side behind the ascending part of the colon and root of the mesentery ; 

 it then comes out on the left side, getting on the edge of the mesentery, 

 and becomes a loose intestine, forming the jejunum : in this course and 

 behind the mesentery, it is exposed as in most quadrupeds, not hid as 

 in the human. The jejunum 6 and the ileum 7 pass along the edge of 

 the mesentery downwards to the lower part of the abdomen, and the 

 ileum makes a turn towards the right side and upwards round the edge 

 of the mesentery ; it then passes up a little way on the right, as high 

 as the right kidney, and there enters the colon or caecum. The caecum 

 lies on the lower end of the right kidney. The colon passes obliquely 

 up the right side, a little towards the left or the middle of the abdomen, 

 and having got as high as the stomach, it crosses to the left ; it then 

 passes down and gets a pretty broad mesocolon. At this part it lies 

 tipon the left kidney, and, as it passes down, it gets more and more to 



1 [Hunt. Prep. No. 576.] 2 [lb. No. 577.] 3 [lb. No. 578.] 



4 [This description is given almost literally in the ' Paper on Whales,' torn. cit. 

 p. 359 ; with additions from that of the stomach of the porpoise and bottle-nose 

 (Hyperoodon). See also Home, Comp. Anat. i. pp. 352-355.] 



5 [Hunt. Prep. No. 706.] 6 [lb. No. 707.] "' [lb. No. 708.] 



