462 



ARTICULATES I CRUSTACEANS. 



segments, each of the latter bearing a. pair of so-called 

 feet. It is the highest of the Crustaceans, and embraces 

 Brachyurans, including Anomurans ; Macrurans ; and 

 Gastrurans. 



Fig. 360. 



Fig. 361. 



Brachyuran : Fiddler Crab, 

 Gelasiinus vocans, Milne-Edw. 



Macruran : Bait Shrimp, 

 Crangon scfteiiispinosiis, Say. 



The Brachyurans include crustaceans which have the 

 hind body popularly called the tail shorter than the 

 cephalo-thorax, and, in a state of rest, doubled under the 



Fig. 362. 



American Edible Crab, Litpa dicantha, Milne-Edw. Reduced one half. 



latter, where it fits into a groove. In the males it is tri- 

 angular, and furnished at the base with two or four horn- 

 like appendages ; in the females it is wider, and has be- 



