39° BULLETIN OF THE BUREAU OF FISHERIES. 



Family HIPPOLYTIDAE. 



Caridea having the first two pairs of legs chelate but the first pair not much stronger 

 than the rest, the carpus of the second pair of legs subdivided, the eyes well developed 

 and not covered by the carapace, the mandibles usually deeply cleft, and the second 

 maxillipeds with a very short seventh article. 



Of the 27 genera now recognized, the following are represented in the Beaufort 

 region. 



KEY TO THE GENER.'i OF THE BE.\UFORT REGION. 



a. Carpus of second pair of legs vary from two to five articles. 

 b. Rostrum exceeding the eyestalks. 

 c. Front margin of carapace with not more than one spine below the eye. 



d. Rostrum with teeth above and below Hippolyte. 



dd. Rostrum finely serrate above, coarsely serrate below Tozeuma. 



cc. Front margin of carapace with several small spines below the eye: rostrum toothed 



at the tiponly Latreutes. 



66. Rostrum not exceeding the eyestalks Concordia. 



aa. Carpus of second pair of legs composed of many articles Hippo lysmata. 



Genus HIPPOLYTE Leach. 



Hippolyle Leach. 1814, p. 431. 

 Hippolyte pleuracantha (Stimpson). PI. xxvi, fig. 8. 



V irbiiis pUuroianihiis Stimv^on, 1874, p. 137; Kingsley, 1878-79, p. 339; Fowler, 1913. p. 330, pi. 95. 



Carapace thin and smooth, anterior border with a spine below eye, side with a sharp hepatic spine 

 behind base of antenna and a small spine on each side at base of rostrum. Rostrum rather stout at base, 

 thin distally, slightly decurved, armed above with two or three teeth, below with one tooth near the 

 tip and two farther back; tip reaching to extremity of antennular peduncle. Outer flagellum of anten- 

 nule tliickened, about as long asantennal scale, and about four-fifths as long as inner flagellum. Antcnnal 

 scale large, extending about one-third its length beyond tip of rostrum. First pair of legs small, chelate. 

 Second pair of legs chelate, the carpus triarticulate. Dactyli of other legs broad, compressed, and armed 

 along their inner edge with small spines. Abdomen strongly geniculated between the third and fourth 

 segments. Posterior part of third segment raised and produced into a sort of hood which overhangs the 

 fourth segment. Telson smooth above, margins with two small, movable spines on each side; tip tnm- 

 cate and armed with slender spines. Dorsal surface of abdomen and thorax, tips of abdominal pleurse. 

 and distal portion of eyestalks with tufts of plumose hairs. 



Length of adult females, 12 to 18 mm. 



Color, often a bright green but usually mottled brown or red. 



This little shrimp, like Tozeuma carolinense, is to be found in abundance on the submerged Zostera in 

 various parts of the harbor. It may also be found in considerable numbers about the rock jetties off 

 Fort Macon. Egg-bearing females occur throughout the summer. 



Genus LATREUTES Stimpson. 



Latreutes Stimpson. 1S60, p. 37 (96). 



Latreutes ensiferus (H. Milne-Edwards). PI. xxvi, fig. 13. 



Htfypolyte ensiferu-s H. Milne-Edwards, 1S34-1S40. t. n, p. 374. 



Latreutes ensiferus Stimpson, i860, p. 37 (96); Bate. 1S8S, p. 583; Rathbun, 1901, pt. 2. p. 114: Stunner, 1911. pt. 2, p. 664. 



Integument smooth and polished, body slender and but slightly humped at end of tliird abdominal 

 somite . Carapace subcylindrical , with a small dorsal spine ; a strong postocular spine andaseriesof five to 

 eight small spines along anterior margin below eye. Rostrum nearly as long as carapace, rather stout at 

 base but rapidly tapering to a thin, deep, slightly upcur\'ed blade smooth above and below and serrate 

 at the apex. Antennae very slender, longer than the body; scale almost as long as rostrum, tapering 



