108 CETACEA. 



The brain weighed three pounds and a half. 



The medulla spinalis is much firmer than in any other animal 1 . 

 There are no puncta lacrymalia. They have an orbicularis palpebrarum 

 muscle. The dilatores muscles of the eye are very strong. The globe 

 of the eye is widest in a transverse direction, as is also the cornea. 

 The sclerotica is not a regular circle in the perpendicular section of the 

 eye, being very much flattened forwards 2 . 



The head of the os humeri is rather further forwards than the upper 

 part of the sternum. The middle part of the head of the os humeri 

 and the top of the sternum are equally near the head. There was no 

 fat in the cellular membrane between the interstices of the muscles, 

 nor on the mesentery. The ends of the ribs are cartilaginous, to 

 which the cartilages going to the sternum are united by ligament 

 through the whole surface, as the vertebras are. 



The two abdominal muscles, which I only reckon the transverse and 

 oblique, in this animal are but thin, and close to the peritoneum. But 

 the straight muscles, or recti, are extremely thick, being about 2 inches 

 thick for the progressive motion of the animal. 



The breasts of the large one, the mother of the present, were full of 

 milk, and made no external projection or prominence. Ludlow and 

 myself both tasted of the milk, and we agreed that it was exceedingly 

 pleasant and rich ; more like cream than milk. The milk was con- 

 tained in large reservoirs or cavities within the breasts, into which it 

 was poured by the secreting vessels : what I mean is, to compare them 

 [the reservoirs] with the pelvis of a' kidney 3 . 



The length of this young one was 7 feet 6 inches. The circumfe- 

 rence round the thickest part or chest, 3 feet 8| inches. The length of 

 the intestinal canal, from the stomach to the anus, 108 feet — about 

 sixteen times longer than the animal 4 . 



The Fjn-Back, or Grampus [Delphinus Orca, Linn. 5 ]. 



The nose, or spouthole of the fauces, is only one canal, is membranous, 

 and pretty straight : but, as soon as it comes to the bones of the head, 

 it is divided into two, through these bones : then, on the upper surface, 



i [Hunt. Prep. Nos. 1361, 1362.] 2 [lb. No. 1776.] 



3 [The justness of this simile is shown in the preparation, No. 3742.] 



4 [Home, Conip. Anat. i. p. 432. Hunter availed himself of Jenner's young 

 Cetacean to illustrate the development of the teeth, as in the Preps. Nos. 327, 

 328, and 389.] 



5 [The skull of this animal is No. 2515, Osteol. Series. The eyeball is preserved 

 in No. 1693.] 



