PHOCiENA COMMUNIS. 103 



John's was hardly projecting, for I compared the two caeca together. 

 They were both females. The clitoris is an oblong round projecting 

 body. 



Order Cetacea 1 . 

 The Porpoise [Phocana communis, Cuv.]. 



The duodenum does not pass behind the mesentery as in most 

 other animals of this class. There are longitudinal valves running 

 through the whole length of the intestines, from the pylorus near to the 

 anus 2 . The guts are a great length, about fifteen times the length of 

 the animal : it has no large gut nor valvular apparatus. The epiploon, 

 which is attached to the stomach before, and to the spleen and pancreas 

 behind, but is not so long as to cover the intestines, has no fat in the 

 most fat porpoise ; nor is there fat in the mesentery. The liver [con- 

 sists of] one lobe, having a small sulcus where the ligamentum rotundum 

 passes : there is a hollow in that part of the liver next to the diaphragm. 

 There is no gall-bladder. The pancreas is a pretty thick oblong body, 

 lying behind the second and third stomach, and attached on its right 

 end to the pylorus, duodenum, <fec. 



There are a vast number of absorbents 3 coming from the intestines, 

 which pass through the lymphatic glands at the root of the mesentery : 

 these glands are very large, and there is a great number of them. 

 These absorbents pass into the thoracic duct, which divides and reunites 

 as it passes through and enters the subclavian [vein]. The chyle was 

 white, and thick as cream. 



The spleens are two, in some five or six, in number, and small for 

 the size of the animal ; one was about as large as a very large walnut, 

 the others small ; they lie in the epiploon, not on the left of the 

 stomach, but on the right of the lower end of the first stomach. 

 There is a passage behind the vena portse, as in the human. 



The diaphragm has no middle tendon, but is interspersed in the 

 middle with tendinous fibres ; it is very oblique in its lateral parts, 

 owing to the ribs going much lower than the sternum. 



1 [The following notes on the anatomy of the Cetaceous order are interesting 

 chiefly as being part of the original materials from which the valuable paper enti- 

 tled " Observations on the Structure and Economy of Whales" was compiled for 

 communication to the Royal Society. They are here, therefore, given as exemplifying 

 Hunter's mode and style of annotation during the dissection of a rare animal. The 

 structures preserved as preparations are passed over with little or no notice in these 

 MSS. ; but they are fully described in the printed paper, and will be found in my 

 edition of the ' Animal Economy,' 8vo, 1837, pp. 331 et seq.'] 



2 [Hunt. Preps. Eos. 704, 739.] ' 3 [lb. No. 860.] 



