THE CRUSTACEA OF NEW JERSEY. 323 



Cyprinodon variegatns, Lucania parva, and Menidia mmidia 

 no tat a. 



Mr. W. Bi. Davis and the writer found it abundant at Great 

 Bay, in ditches, and along the shores, often in vegetation. It 

 was less common than Paicemonetes vulgaris, with which asso- 

 ciated, besides Angiiilla chrisypa, Fundulus heteroclitus inacrole- 

 pidotus, Pimdulus liicia:, Tylosurns inarinus, Apcltes quadracus, 

 Syngnathus fusciis, Menidia menidia notata, Pomatomus salta- 

 trix, Centropristis striatus, Tautoga onitis, Opsaniis tan and 

 Pseudopleuronectes americanus. 



It has been found in Staten Island, N. Y., by my friend Mr. 

 W. T. Davis. . 



Alliance Pal.^monoida. 



Mandibles deeply cleft into well calcified incisor and molar 

 branches, and usually have stout incurved palp. Exopodites of 

 first maxillipeds end in flagellum. Dactylus of second maxilli- 

 peds "complemental" of propodite, as in Pandaloida. Cran- 

 gonoida, etc. None of thoracic legs have exopodites, and of 

 first two pairs one remarkably massive, both being chelate. 



Key to the Families. 



a. Carpus simple. pal.Emonid^. 



aa. Carpus of many articles. hippolytid.^. 



Family PAL^MONIDL^. 



Rostrum well developed. Antennular scale present. Two 

 long antennular flagella, outer split into two unequal filaments. 

 x\ntennal scale of good breadth. Mandible deeply cleft into 

 incisor and molar processes and with stout two or three- jointed 

 palp. Coxa and basis of first maxillse and first maxillipeds well 

 developed, but not coxa of second maxillae. Terminal joint of 

 second maxillipeds lies obliquely along distal part of inner 

 border of propodite, as if complemental piece of propodite. Ex- 

 ternal maxillipeds pediform, third joint (ischium-merus) curved 

 outwards a little. Exopodites of all three pairs of maxillipeds 

 flagelliform and lax. First and second pairs of legs chelate, first 



