230 



BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



caudal rami, and by the details of the fifth legs. It evidently sticks 

 rather closely to the beach sands, since no specimens have been 

 obtained elsewhere. 



STENHELIA REFLEXA (Brady) 



Figure 354 



Delavalia rcflcxa, Brady, A monograph of the free and semiparasitic Copepoda 



of the British Islands, vol. 2, p. 45, pi. 51, figs. 1-8, 11, 13, 1880. 

 Stenhelia reflexa Sars, Crustacea of Norway, vol. 5, p. 186, pi. 123, 1906. 



Occurrence. — Ten specimens, inchiding both sexes, were washed 

 out of sand dredged at a depth of 23 fathoms, 12 miles south of No 

 Mans Land. 



Distribution. — British Isles (Brady); Norwegian fiords (Sars), 

 Color. — Body semitransparent and a uniform pale yellow, without 

 pigment markings; eye bright red. 



Female. — Body short and stout; rostrum broadly triangular at its 

 base, tongue-shaped at the tip; urosome nearly as long as the 



metasome and tapered posteriorly; 

 genital segment partly divided and 

 conspicuously dilated anteriorly; cau- 

 dal rami as long as anal segment, 

 twice as long as wide. Rami of first 

 legs equal in length, the endopod 2- 

 segmented, each segment with an in- 

 ner seta ; the middle segment of the ex- 

 opod has an inner seta, the end seg- 

 ment has three outer spines and two 

 apical setae; distal segment of fifth 

 legs spatulate, considerably narrowed 

 at its base, with five setae, the second 

 and third inner ones filiform, the third 

 one very rudimentary ; basal expansion 

 broadly rounded, with five elongate 

 stout setae, the outer one smaller than 

 the others. Total length, 0.45-0.55 mm. 

 Male. — Smaller than female and 

 more slender; second endopod 2-seg- 

 mented, the distal segment longer and narrower than the proxi- 

 mal, with a short, denticulated, spinelike process at the tip and four 

 unequal setae on the inner margin; fifth legs much reduced in size, 

 the distal segment not separated at its base, but fused with the 

 basal segment and armed with four setae, the second outer one 

 terminal and filiform; basal expansion conical, as long as the distal 

 segment and tipped wath a single seta; the sixth legs are repre- 



FiGURE 154. — stenhelia rcflexa: a. 

 Female, dorsal ; h, male, fifth leg 



