LECTURE VIL 
19 
in the Mediterranean and Atlantic seas, and about 
some of the African coasts. A most magnificent 
specimen taken on the English coasts is pre- 
served in the Leverian Museum. 
The Green or Edible Turtle, which is the 
T. Mydas of Linnasus, grows also to a very large 
&\ze', often measuring more than five feet in 
length, and weighing five or six hundred pounds. 
Its colour is a dull palish brown, with a few 
dusky variegations. The introduction of this 
animal as an article of luxury into England is 
of no very distant date, and can perhaps hardly 
be traced mucli farther than about fifty or sixty 
years backward. They are chiefly found about 
the Bahama islands, and seem to feed chiefly 
on marine vegetables, from which their fat ac- 
quires the greenish colour which gives name to 
the animal. 
The T. Caretta of Linneeus or the Loggerhead 
Turtle, is of at least ecjual size to the former, 
and often superior : its colours are beautiful, hav- 
ing a finely variegated shell, but the horny pieces 
or divisions are too thin for the purposes of the 
artificers in tortoise-shell, and are therefore neg- 
lected in trade ; as a species it may be distio- 
