276 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



stout, with a strong terminal claw. Fifth legs lamellar; distal 

 segment two and one-half times as long as wide, with two apical and 

 four outer setae, the second and third inner ones filiform; basal 

 expansion triangular, reaching beyond the center of the distal ,seg- 

 ment, with two apical and three inner setae, the second outer one the 

 longest, the inner one far removed from the others. Total length, 

 0.95-1.1 mm. 



Male. — Slightly smaller than the female; first antennae 6-seg- 

 mented, stronglj'- hinged, the two basal segments with spines, the 

 fourth segment greatly swollen posteriorly and produced anteriorly 

 into a hamiform process. Endopod of ,second legs unmodified; 

 endopod of third legs 3-segmented, middle segment with a sharp 

 spine reaching far beyond the tip of the end segment. Fifth legs 

 much reduced in size ; distal segment with three apical and one outer 

 lobes, each with a seta ; basal expansion nearly obsolete, but with two 

 elongate setae. Total length, 0.9-1 mm. 



Remarks. — This is one of the largest species of the genus and may 

 be recognized by its size, its dark color, the large spines on the 

 antennae, and the structure of the fifth legs. It is here reported for 

 the first time from American shores. The nauplius and metanau- 

 plius stages are figured and described in Studi del Laboratorio 

 Marino Genova, 1921 (p. 97). 



LAOPHONTE LONGICAUDATA Boeck 



FlGUEB 172 



Laophonte longicaudata Boeck, Forh. Vid.-Selsk. Christiania, 1864, p. 279. — 

 Sars, Crustacea of Norway, vol. 5, p. 243, pi. 164, 1908. 



Occuirrence. — Fifteen females and one male were obtained from 

 Sengekontacket Pond, Marthas Vineyard, July, 1926. 



Distribution. — British Isles (Brady) ; coast of Norway (Sars, 

 Boeck) ; Franz Josef Land (T. Scott) ; Adriatic (Car, Carazzi, 

 Pesta) ; Woods Hole (Sharpe). 



Color. — Body yellowish white, with three transverse bands of light 

 orange, one across the cephalic segment just in front of its center, a 

 second across the posterior half of the genital segment, and the third 

 across the anal segment; eggs a dark gray, with an orange center; 

 eye dull red. 



Female. — Body .slender, nearly five times as long as wide; cephalic 

 segment longer than the rest of the metasome ; rostrum broadly tri- 

 angular, curved downward and 3-lobed at its tip; urosome three- 

 fifths as long as metasome; anal segment as long as the penultimate 

 segment ; caudal rami as long as these two segments combined. First 

 antennae 7-segmented, the two basal segments enlarged, the second 

 segment with a small posterior spine; exopod of second antennae 



