THE CRUSTACEA OE NEW JERSEY. 339 



all young of a brood have the larger claw developed on the 

 same side. The young are hatched as pelagic free-swimming 

 larvae, living at the surface of the ocean from six to eight 

 weeks, when, after having moulted five or six times, it 

 goes to the bottom and appears in habit and general structure 

 like a very small adult animal. xA^fter reaching the bottom it 

 travels towards the shore and establishes itself in rock piles in 

 harbors and at the mouths of rivers, where it remains until 

 driven out by the ice. The problem of artificial propagation will 

 be solved when means are devised by which the larvse after 

 hatching can be reared in large enclosures until the fifth or sixth 

 stage, when they are able to care for themselves. 



Frequently taken along our coast, though not common, and 

 apparently mostly used locally. But few, or only occasionally 

 large ones, are sent to restaurants or exposed for sale. I have 

 examined several alleged New Jersey examples from Cape May, 

 Atlantic City, Anglesea, also the Delaware breakwater and Otean 

 City. The latter was in the possession of Mr. W. B. Davis 

 and was picked up on the beach. Mr. Davis assures me that 

 occasionally he finds similar small ones during cold weather, or 

 in late fall and early winter, where they seem to be cast up and 

 be numb with the cold. An example is in the Academy frcHii 

 Delaware Bay received from Dr. Fitler. 



Mr. W. T. Davis says he found lobsters occasionally washed 

 on the south shore of Staten Island, N. Y.. though had not met 

 with any recently. 



Genus CAMBARUS Erichson. 



The Crawfishes. 



Cambarus Erichson, Arch. Naturgesch., XII, 1846, p. 88. Type Astacus 



bartonii Fabricius, fourth species, designated by Faxon, Proc. U. S. Nat. 



Mus., XX, 1898, p. 644. 

 Orconectes Cope, Anier. Nat.. VI, 1872, pp. 409, 419. Type Orconectes 



inertuis Cope, first species. 

 Cainbarellus Ortmann, Proc. Amer. Philos. Soc. Phila., XLIV, 1905, pp. 97, 



106. Type Cambarus niontesumce Saussure, third species, designated. 

 Paxonius Ortmann, 1. c, pp. 97, 107. Type Astacus limostis Rafinesque, fifth 



species, designated. 



