68 KKOX ON THE CETACEA. 



From the notes taken at the time, I find that my brother 

 remarks that the Dolphin of Orkney differed a good deal in shape 

 from those found in the Forth and seas in the South of Scotland. 

 There were, moreover, 16 more vertebrae than in the skeleton of 

 the Common Porpoise of authors. The teeth generally weighed 

 2^ grains each. 



Further, the muscles of the tongue, intrinsic as well as ex- 

 trinsic, were extremely well developed. The isthmus faucium 

 was 3 inches long. All this part was extremely glandular. A 

 well-marked muscular gullet followed, composed of two layers of 

 muscular fibres, — one circular internally, and one longitudinal ex- 

 ternally. These latter sent a slip to the base of the arytaenoid car- 

 tilages. The mucous membrane of the gullet had no true epidermic 

 covering, and in this respect diifered remarkably from the first 

 gastric compartment, from which a cuticular lining could be 

 peeled off, as strong as that from the sole of the foot in man. 

 The larynx presented that organization so well described by the 

 illustrious Cuvier, and which I believe to be peculiar to the 

 whales with teeth. It differs very much, as I explained long 

 ago, in its arrangement from that of Whalebotie Whales, — a fact of 

 which I think Cuvier was not aware. The cricoid cartilage was 

 imperfect in form ; the hyo-epiglottic muscles very strong. The 

 proper arytaenoid were present, and strong, but did not extend so 

 high as in man ; the thyro-arytaenoid muscles were very fully de- 

 veloped. In the interior of the larynx there were no projections 

 nor ventricles, no cuneiform cartilages, nor cornicula laryngis. 

 The rings of the trachea formed complete circles. 



Stomach. — The cuticular lining is limited to the first cavity or 

 compartment. It is in the second compartment that is found the 

 curious glandular arrangement first, I believe, described by me in 

 the ' Transactions of the Royal Society of Edinburgh.' This 

 structure is most probably not limited to the second compart- 

 ment. There are four distinct compartments in the stomach of 

 this animal. A dilated duodenum follows, 6 inches in length. It 

 is possible that this may have been in some instances mistaken for 

 a stomach. The valvulae conniventes commence with the jejunum ; 

 these are longitudinal, and extend to within about 6 inches of tlie 

 anus, terminating at a point where the intestine seems enlarged. 

 The length of the intestines, large and small, was 90 feet ; circum- 

 ference generally about 2 inches. Thousands and tens of thou- 

 sands of parasitical worms were found in the stomach, but none in 

 the intestine. In the stomach also we found four mandibles of 



