Structure and Oeconomy of Whales. 373 
anatomical ftru&ure of lome genera, and fuch a knowledge of 
the drudture of particular parts of fome others, as to enable 
me to afcertain the principles of their oeconomy. 
Thofe which I have had opportunities of examining were 
the following : 
Of the Delphinus Phocaena, or Porpoife, I have had feve- 
ral, both male and female. 
Of the Grampus I have had two ; one of them (Tab. XVI.) 
twenty-four feet long, the belly of a white colour, which termi- 
nated at once, the tides and back being black; the other (Tab. 
XVII.) about eighteen feet long, the belly white, but lefs fo than 
in the former, and (haded off into the dark colour of the back. 
Of the Delphinus Delphis, or Bottle- nofe Whale (Tab. 
XVIII.) I had one fent to me by Mr. Jenner, Surgeon, at 
Berkeley. It was about eleven feet long. I have alfo had one 
twenty-one feet long, refembling this lad in the (hape of the 
head, but of a different genus, having only two teeth in the 
lower jaw (Tab. XIX.); the belly was white, (haded off into 
the dark colour of the back. This fpecies is defcribed by 
Dale, in his Antiquities of Harwich. The one which I 
examined muff have been young ; for I have a (kull of the 
fame kind, nearly three times as large, which mud have be- 
longed to an animal thirty or forty feet long. 
Of the Balaena rodrata of Fabricius, I had one, feven- 
teen feet long (Tab. XX.). 
The Balaena Mydicetus, or large Whalebone Whale, the 
Phyfeter Macrocephalus, or Spermaceti Whale, and the Mo- 
nodon Monoceros, or Narwhale, have alfo fallen under my 
infpe&ion. Some of thefe I have had opportunities of exa- 
mining with accuracy ; while others I have only examined in 
part, 
