432 REPORT OF NEW JERSEY STATE MUSEUM. 



eat it as the opportunity affords. It is abundant on our coast, and 

 I have seen it at Point Pleasant, Ocean City, Anglesea, and Stone 

 Harbor. My specimens from Atlantic City Inlet and Sea Isle 

 City. Mr. W. T. Davis says it is common on the south shore of 

 Staten Island, N. Y. 



T7'ibe Grapsoidea. 

 The Grapsoid Crabs. 



Carapace broad anteriorly, often subquadrate, sometimes sub- 

 globose, truncate or arcuate anteriorly, but not rostrate. Front 

 bent dov/nward. Epistome short, often almost linear. Pairs of 

 branchiae usually less than nine, efferent channels opening at 

 sides of endostome. Male verges inserted either in sternal 

 plastron or in basal joints of last pair of legs, thence passing 

 through channels in sternum beneath pleon. 



In this group are included a number of familiar forms, often 

 with quite different habits. 



Key to the families. 



a. Carapace often more or less membranous ; front, orbits and eye-stalks 

 usually very small ; buccal frame arcuate anteriorly ; size small. 



PINNOTHERID^. 



aa. Carapace hard and firm ; front, orbits and eye-stalks not very small ; 



buccal frame quadrate anteriorly. 



b. Third maxillipeds with fifth joint articulated at apex or front outer 



angle of foiirth ; front usually broad; eye-stalks of moderate size. 



greatly elongate. ocypodid^. 



bb. Third maxillipeds with fifth joint articulated at front inner angle 



usually ; front of moderate width or very narrow ; eye-stalks often 



greatly elongate. ocypodid.^ 



Family PINNOTHERiID^. 



The Oyster Crabs. 



Carapace often more or less membranaceous, antero-lateral 

 edges entire or very slightly dentate. Front, orbit and eye-stalks 

 very small. Buccal frame usually arcuate anteriorly. Outer 



