86 CRABS AND INSECTS. 
Order VII. Ten-footed Crustaceans (Decapoda) ; 
Long-tailed Crustaceans (d/acrura).— The shrimps 
(Fig. 96) are common on nearly all shores. Some possess 
Fic. 96.—Prawn (Palemon jamazcensis), about $ natural size. A, female. 
B, fifth thoracic appendage of male. (After Huxley.) 
the faculty of mimicry to a wonderful degree. The chame- 
leon shrimp changes to green and brown, even becoming 
transparent under certain conditions. Deep-red-colored 
ones have been found in the Atlantic, and others from great 
depths have remarkably developed eyes. Cray-fish in the 
Mammoth Cave are blind, and the eyes of Willemesia, 
from the deep Atlantic, are rudimentary. Lobsters (Fig. 
98) that are familiar on Northern coasts are in Florida re- 
placed by the whip-lobster (Fig. 99), that has long whips 
instead of the large claws. 
