CRUSTACEA 231 



Eupanopeus herbstii Milne-Edwards (Mud Crab) 



PLATE XXVII. Fig. 4 



Larger than the above two species (up to 2 

 inches) ; carapace with a dentate anterior border 

 and with a tubercle just beneath the first tooth; the 

 larger claw has a tubercle at the base of the movable 

 segment; terminal abdominal segment of the male 

 rounded. Gray with black fingers. 



With the above three species but not common; 

 Long Island to Florida, more common south of 

 Virginia. 



Rithropanopeus harrisii Gould (Brackish Water 



Mud Crab) 



PLATE XXVII. Fig. 2 



Smaller than E. herbstii (less than 1 inch); dull 

 brown or gray with fingers pale. 



Frequents brackish water and salt marshes; 

 known from Dennis Creek, New Jersey, and Mis- 

 pillion River, Delaware, and can probably be found 

 in similar habitats elsewhere in the region. Known 

 from Massachusetts to Florida. 



Eurytium limosum Say 



PLATE XXVII. Fig. 7 



Differs from the above four species by being 

 more oval and having a nearly smooth carapace 

 with ridges; bright purple-blue in color. A tropical 

 crab known as far north as New York, but very rare 

 north of South Carolina. Some specimens were ob- 

 tained many years ago from the New Jersey coast. 



