60 
LECTURE VIIL 
of Gymnetrus, distinguished by its very long, 
compressed body, numerous, small, slender teeth, 
and very long, slender ventral fins or processes. 
One of the most remarkable species is that which 
has been named the Kusselian Gymnetrus, from 
the late Dr. Patrick Russel : it w^as of a silvery 
colour, and is represented on the plate we are 
now vievring in its natural size, and was proba- 
bly a young specimen from its want of visible 
teeth. The same animal in its complete or ad- 
vanced state appears from the description of Pro- 
fessor Ascanius and others to measure not less 
than ten feet in length, with a strongly marked 
lateral line, and a few rows of dusky spots across 
the body. It is a native of the Northern and 
Indian seas, and is popularly called the King of 
the Herrings. 
Another species is the Hawkenian Gymnetrus, 
or Blochian Gymnetrus ^ in its general appear- 
ance much allied to the former, but differing in 
colour, having the fins of a bright red, and the 
body clouded with blueish bands. A specimen 
measuring six feet in length and about ten inches 
in breadth, was taken on the coast of Cornwall. 
