Crustacea. 563 



VI. CRUSTACEA 



For the means of preparing this Catalogue of our Crustacea, I 

 have been almost entirely dependant upon notes which have been fur- 

 nished me by Augustus A. Gould M. D. of Boston. But as he had 

 only a very short notice of my wish to obtain such a catalogue, he is 

 unwilling to appear as the responsible author of it. I apprehend, 

 however, without pretending to much knowledge on the subject, that 

 even as I have prepared it, it will not be found very deficient or inac- 

 curate. And had that gentleman consented to make it out himself, 

 I presume it would have been still less defective. Specimens of near- 

 ly all of them are in the Cabinet of the Boston Society of Nat. Histo- 

 ry, and may be found described by Mr. Say, in the Journ. of the 

 Acad. of Nat. Sciences, of Philadelphia. 



ORD. I. DECAPODA. 



Fam. I. Brachyura. 

 Portunus. 



p ictus. 

 Lupa. 



hastata. Nantucket. Blue claw Crab. 

 Cancer. 



granulatus. Martha's Vineyard and Nantucket. Sand Crab. 



irroratus. ibid. 



limosa. ibid. 



and one other. 

 Ocypode. 



pugilator. Martha's Vineyard and Nantucket. Fiddler Crab. 

 Pinnotheres T 



ostreum. In Oysters. 



one other species. Cambridge. Marshes, near salt water. 

 Grapsus. 



pelagicus ? Say. Gulf Stream. 

 Libinia. 



canaliculata. Bost. Harbor, and Cape Cod. Spider Crab. 



Fam. II. Macroura. 

 Astacus. 



marinus. Bost. Harbor. Lobster. 

 Hippa. 



emeritus. Fab. H. talpoida? Say. Cape Cod and Vin. Sand bug. 

 Pagurus. 



longicarpus. Inhabits genus IVassa. Hermit Crab. 



pollicaris. Inhabits genus Natica, Pyrula, &c. Hermit Crab. 

 Palaemon. 



vulgaris. Inlets, both the last are called Shrimps. 

 Crangon. 



septemspinosus, Say. Inlets, 



ORD. II. STOMAPODA. 



Squilla. 



empusa, Say. 



ORD. III. AMPHIPODA. 



Taliprus. 



longicornis. Under Sea Weed. Sand Flea. 



