VIII. — The Early Stages of Hippa talpoida, with a note on 

 THE Structure of the Mandibles and Maxillj? in Hippa and 

 Remipes. By Sidney I. Smith. 



The biological station, established under the auspices of the United 

 States Commissioner of P^ish and Fisheries, at Wood's Hole, Massa- 

 chusetts, during the summer of 1875, afforded several naturalists, and 

 among them the writer, excellent facilities for studying the marine 

 animals of Vineyard Sound and the adjacent waters. The locality is 

 very favorable for obtaining in abundance the free-swimming larvjB 

 of a great variety of marine animals. Among the young of numerous 

 species of crustacea, the zoeae o^ Hippa were particularly interesting, 

 and I svicceeded in obtaining a nearly complete series of the post- 

 embryonal stages of that peculiar genus. 



Since almost nothing has been published in regard to the habits of 

 any of the species of Hippidaj or Albunidae, a few words in regard to 

 the habits of the only species, of either Fig. i.- 



of these groups, living upon the coast 

 of New Elngland may" not be out of 

 place here. 



Hippa talpoida inhabits the entire 

 eastern coast of the United States from 

 Cape Cod southward to the west coast 

 of Florida ; Egmont Key being its most 

 southern and western habitat known 

 to me. At what point it is met or 

 replaced by the Brazilian H emerita, 

 I am unable to determine, never having 

 seen specimens of either species from, 

 or the record of their occurrence in, 

 the West Indies or Central America, 

 although some species of the genus 

 probably inhabits both these regions. 

 On the sandy coasts of the southern United States the H. talpoida is 

 apparently very abundant, while on the coast of New England it is 

 much less common, being found only in special localities, although, 



* Hippa talpoida, adult female with the antennae extruded, dorsal view, enlarged 

 about two diameters. 

 Trans. Conn. Acad., Vol. III. 40 April, 1877. 



