106 CETACEA. 



The liver of the foetus or young porpoise 1 is very small in proportion 

 to the size of the body when compared with the human foetus. As 

 a proof it is air they breathe, they have no organ for smell in the blow- 

 hole 2 . 



As porpoises have no hinder extremities, and no bones of the pelvis, 

 the lower part of the belly is much narrower than in those animals 

 which have them. 



Whale, from Mr. Jenner 3 , from Gloucester [Delphinus Tursio, 



Fabr. 4 ]. 



The oesophagus is large, having a strong muscular coat, a white liga- 

 mentous coat or cutis, and a cuticle 5 . It dilates nearly equally on all 

 sides into the first cavity of the stomach. The stomach all along its 

 small curve is attached to the liver and vessels of the back very firmly ; 

 and the first stomach, or cavity, is attached to the diaphragm, on the 

 left posteriorly, by a very broad surface. The stomach, in its shape, 

 number of cavities, &c, is similar to that in the common porpoise. 



The duodenum is not bound down anywhere, nor does it go to the 

 left as in most other animals, but becomes loose almost immediately. 

 The rectum, as it passes down the back, is hid between the kidneys 6 . 



The liver is very much of the shape of that in the human subject ; 

 the only difference is that the left lobe is nearly as large as the right. 

 There is no passage behind the porta of the liver, therefore the cavity 

 of the epiploon and cavity behind the stomach form a circumscribed 

 cavity. The duct of the liver passes down and enters into the substance 

 of the head of the pancreas, receiving the pancreatic ducts into it, 

 which for some way in the pancreas are tinged with the bile ; and it 

 would appear to pass upwards and enter the cavity of what may be 



2 feet in length. There was milk in the mother's mammary glands, which were 

 largely developed. I was indebted to Mr. Shaw for the opportunity of inspecting 

 this specimen ; I conclude, therefore, that the period of gestation in the porpoise is 

 nine months. A female grampus was killed off the Isle of Portland on the 2nd of 

 May ; she had a young one in utero 3 feet long, and was accompanied by the young 

 of the previous year, which was 10 feet long, and in which the teeth were just begin- 

 ning to be formed.] 



1 [The heart of, probably, this young specimen is No. 3717, Hunt. Phys. Series.] 



2 [See Hunt. Preps. Nos. 1541—1544.] 



3 [Afterwards Dr. Jenner, the discoverer of vaccination : he was one of Hunter's 

 house pupils.] 



4 [The skull of the parent of the young specimen here described, is No. 2486, 

 Osteol. Series.] 



5 [Hunt. Prep. No. 454.] 



6 [The structure of the intestine is shown in Preps. Nos. 705, 740. 741.] 



