86 CRABS AND INSECTS. 



Order VII. Ten - footed Crustaceans (Decapodd] \ 

 Long-tailed Crustaceans (Macrura]. The shrimps 

 (Fig. 96) are common on nearly all shores. Some possess 



FIG. 96. Prawn (Palamon jamaicensis}, 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 Willemcesia, 

 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. 



