1879.] NATURAL SCIENCES OF PHILADELPHIA. 413 



nath ; first four pairs of feet with exopodite ; first pair rather 

 stout, chelate, second filiform chelate, carpus multiarticulate. 

 Type Hippolysmata vittata Stm. 



Hippolysmata ivurdemanni (Gibbes, sp.) Stm. Professor Web- 

 ster collected a large number of this species at Sarasota and 

 Florida Bays, Fla. There also occur in the collection some young 

 specimens from Bird Shoal, Beaufort, N. C, which I doubtfully 

 refer to this species. I have seen specimens from Fort Jefferson 

 (Lieut Jacques), and Key West (Packard). 



o Genus Tozeuma Stm. 1 Body greatly elongate, slender, com- 

 pressed ; rostrum slender, very long, sometimes scarcely shorter 

 than the body ; antennulre short, biflagellate ; external maxilli- 

 peds very short, without exognath or flagellum, pereiopoda with- 

 out palpi ; first pair very short, stout, chelate, second filiform, 

 chelate ; carpus triarticulate, telson elongate, lanceolate. Type 

 Tozeuma lanceolatum Stm. 



Tozeuma carolinensis Kingsley (Plate xiv. fig. 8), was collected 

 at Charlotte Harbor, Fla., and Beaufort, N. C. ; at the latter place 

 in a surface net. 



Genus Latreutes Stm. 2 Carapax with a dorsal median spine. 

 Rostrum elongate, lamellate, antennulae biflagellate, basal scale 

 short, orbiculate, hidden under the eyes ; antennal scale acute ; 

 external maxillipeds short, with exognath ; first four pairs of pe- 

 reiopoda with palpi, first two pairs chelate, second with the carpus 

 triarticulate. Type Latreutes ensiferus (Edw., sp ). 



Genus Rhynchocyclus Stm. :i Rostrum large, lamellate, obicu- 

 late, antennulae biflagellate, peduncle short; external maxillipeds 

 short, with exognath; first four pairs of pereiopoda palpigerous ; 

 first two chelate, second with the carpus triarticulate. Type 

 Rhynchocyclus planirostris (De Haan, sp.). 



o Genus Concordia, 4 nov. Dorsum of carapax strongly protu- 

 berant ; rostrum very short, eyes free ; antennuloe with two very 

 short flagella ; antennal scale very small ; flagellum moderate ; 

 external maxillipeds short, stout; first pair of pereiopoda shorter 



1 Proc. Phila. Acad., 1860, p. 26. Angasia White, Sp. Bate Proc. Zool. 

 Soc. London, 1863, p. 498. 



2 Proc. Phila. Acad., 1860, p. 27. 



3 Cyclorhynchus De Haan, Fauna Japonica, Crustacea, p. 174 (nom. 

 prseoc.) Rhynchocyclus Stm., Proc. Phila. Acad., 1860, p. 27. 



4 Named in honor of Union College, to which the specimens helong. 



