530 APPENDIX. 



These two kinds of fat in the head are con- 

 tained in cells or cellular membrane, in the same 

 manner as the fat in other animals ; but besides 

 the common cells there are larger ones, or liga- 

 mentous partitions going across, the better to sup- 

 port the vast load of oil, of which the bulk of the 

 head is principally made up. 



There are two places in the head where this oil 

 lies ; these are situated along its upper and lo\ver 

 parts : between them pass the nostrils, and a vast 

 number of tendons going to the nose and dif- 

 ferent parts of the head. 



The purest spermaceti is contained in the small- 

 est and least ligamentous cells : it lies above the 

 nostrils, all along the upper part of the head, im- 

 mediately above the skin and common adipose 

 membrane. These cells resemble those which 

 contain the common fat in the other parts of the 

 body nearest the skin. That which lies above the 

 roof of the mouth, or between the nostrils, is more 

 intermixed with a ligamentous cellular membrane, 

 and lies in chambers whose partitions are perpen- 

 dicular. These chambers are smaller the nearer 

 the nose, becoming larger towards the back part 

 of the head, where the spermaceti is more pure. 



This spermaceti, when extracted cold, has a 

 good deal the appearance of the internal struc- 

 ture of a water-melon, and is found in rather so- 

 lid lumps. 



About the nose or anterior part of the nostril, 

 I discovered a great many vessels, having the ap- 

 pearance of a plexus of veins, some as large as a 



