790 CRUSTACEA—SHRIMP. 
2H ES RE SEP 

Surimps possess long, slender feelers, and between them two thin, project- 
ing lamin; the claws have a single hooked, moveable fang; they have 
three pair of legs; seven joints in the taii; the middle caudal fin subulated, 
the four others round and fringed; a spine on the exterior side of each of 
the outmost. These animals, which are of a delicate flavor, inhabit the 
shores of Britain in vast quantities, ascend the rivers, and even find their 
way into the ditches and ponds of salt marshes. Those caught in the sea 
are, however much better than those of the rivers. They are also found in 
the United States. . 
THE PRAWN? 
Tue prawn is not unlike the shrimp, but exceeds it in size, being at least 
three times as big; and is more pleasing in color, it having, when boiled, 
the most beautiful pink tint all over its body. The flesh is better tasted than 
that of the shrimp. It has a long horn in front of its head, compressed 
vertically, which bends somewhat upward, and is serrated both above and 
below. Seaweeds, and the vicinity of rocks near the shore, are the haunts 
of the prawn, which, unlike the shrimp, seldom enters the mouths of rivers. 
It usually swims on its back, but when in danger it throws itself on one 
side, and springs backward to a considerable distance. 
1The genus Crangon, or shrimp, has the anterior part of the legs largest, with a com- 
pressed nionodacty, hand; the second and third parts more slender ; the fcurth and fifth 
thicker; exterior antenne setaceous, the length of the body; the intermediate divided 
into two filaments; shell thin, semi-transparent, with a short rostrum before. 
2 Palemon serratus, LEACH. 
