VOL. LXXVII.] PHILOSOPHICAL TRANSACTIONS. 327 



of the penis, in the male, bending down to open on what is called the belly of 

 the animal ; and in its whole course it is gently convoluted. In those which 

 have no caecum, and therefore can hardly be said to have a colon, the intestine 

 before its termination in the rectum makes the same kind of sweep round the 

 other intestines, as the colon does where there is a caecum. 



The intestines are not large for the size of the animal, not being larger in 

 those of 18 or 24 feet long than in the horse, the colon not much more capa- 

 cious than the jejunum and ilium, and very short; a circumstance common to 

 carnivorous animals. In the piked whale, the length from the stomach to the 

 caecum is 284- yards, length of caecum 7 inches, of the colon to the anus 2|. 

 yards. The small intestines are just 5 times the length of the animal, the colon 

 with the caecum a little more than half its length. 



Those parts that respect the nourishment of this tribe do not all so exactly 

 correspond as in land animals ; for in these one in some degree leads to the 

 other. Thus the teeth in the ruminating tribe point out the kind of stomach, 

 caecum, and colon ; while in others, as the horse, hare, lion, &c. the appear- 

 ances of the teeth only give us the kind of colon and caecum ; but in this tribe, 

 whether teeth or no teeth, the stomachs do not vary much, nor does the circum- 

 stance of caecum seem to depend on either teeth or stomach. The circum- 

 stances by which, from the form of one part we judge what others are, fail us 

 here ; but this may arise from not knowing all the circumstances. The sto- 

 mach, in all that I have examined, consists of several bags, continued from the 

 first on the left towards the right, where the last terminates in duodenum. The 

 number is not the same in all ; for in the porpoise, grampus, and piked whale, 

 there are 5 ; in the bottle-nose 7. Their size respecting each other differs very 

 considerably ; so that the largest in one species may in another be only the 2d. 

 The 2 first in the porpoise, bottle-nose, and piked whale, are by much the 

 largest ; the others are smaller, though irregularly so. 



The first stomach has, I believe, in all very much the shape of an Ggg, with 

 the small end downwards. It is lined every where with a continuation of the 

 cuticle from the oesophagus. In the porpoise the oesophagus enters the superior 

 end of the stomach. In the piked whale its entrance is a little way on the 

 posterior part of the upper end, and is oblique. - . 



The 2d stomach in the piked whale is very large, and rather longer than the 

 first. It is of the shape of the Italic S, passing out from the upper end of the 

 first on its right side, by nearly as large a begirming as the body of the bag. In 

 the porpoise it by no means bears the same proportion to the first, and opens by 

 a narrower orifice ; then passing down along the right sight of the first stomach, 

 it bends a little outwards at the lower end, and terminates in the 3d. Where 

 this 2d stomach begins, the cuticle of the 1st ends. The whole of the inside 



