CRUSTACEA 243 



Uca minax LeConte (Rod Jointed Fiddler Crab) 



PLATE XXVII. Fig. 6 



Larger than the other Fiddlers and easily 

 distinguished by the red marks at the joints of the 

 ehelipeds (legs). 



It is found in marshes in brackish or almost 

 fresh water. It digs holes, often as big as 2 inches 

 in diameter, considerably above high tide line; it 

 often builds an archway over the mouth of its bur- 

 row, which it uses as an "outlook. " 



Common in the Delaware Bay region in Dennis 

 Creek, Maurice River, etc., and in similar situations 

 elsewhere in the state; known from Cape Cod to 

 Florida. 



Ocypoda albicans Bosc (Sand Crab; Ghost Crab) 

 (0. arenaria Say) 



PLATE XXVI. Fig. 5 



Somewhat resembles Uca but without the great- 

 ly enlarged claw. Carapace almost square in shape 

 and about 2 inches long; white or gray in color. 



This species burrows round holes in the sand 

 near and not infrequently above high water mark. 

 The animals may be seen scurrying very rapidly over 

 the sand and disappearing into their burrows. These 

 holes may be as much as 3 feet deep and often 

 honeycomb the sand with underground passages. 

 The movable eyestalks of these crabs are very con- 

 spicuous. 



Very difficult to catch because of their great 

 speed. However, because of their nocturnal habits 



