382 BULLETIlsr 15 8, UNITED STATES NATIONAL MUSEUM 



Distribution. — Not found outside the present area. 



Color. — Dorsal surface light brown, often with a greenish tinge, 

 ventral surface j)aler and yellow. 



Female. — Cephalic segment semielliptical, one-half wider than 

 long; bases of first antennae wholly visible in dorsal view; meta- 

 some regularly tapered; posterior margin of fourth segment only 

 half the width of anterior margin; urosome two-thirds as long as 

 metasome; caudal rami narrow cylindrical, twice as long as wide. 

 Exopods of second, third, and fourth legs 4-segmented, their outer 

 spines dentate and flagellate ; fifth leg 2-segmented, end segment four 

 times as long as wide, with one outer and three unequal apical setae. 

 Total length, 2-2.15 mm. 



Male. — Unknown. 



Rennarks. — This is a rare species, which may be recognized by the 

 4-segmented exopods of the" second, third, and fourth legs. 



BOMOLOCHUS ALBIDUS, new species 

 Plate 23, e-; 



Occurrence. — Found abundantly in the gill chambers of nearly 

 every goosefish {Lofhius piscatorius) examined at Woods Hole. 

 They are fastened to the skin in the little pocket above each pelvic 

 fin, but do not appear elsewhere. A single female (U.S.N.M. 

 No. 60589) is made the species holotype; the others become para- 

 types with U.S.N.M. No. 60590. 



Color. — Body white and opaque, without pigment ; eggs also white ; 

 no eye visible. 



Female. — Cephalic segment strongly arched dorsally and trans- 

 versely elliptical, three-fifths as long as wide ; basal half of first an- 

 tennae entirely concealed in dorsal view. Second and third metasome 

 segments about the same width, which is a little narrower than the 

 head; fourth segment abruptly reduced to half the width of the 

 third; fifth segment considerably widened at the center through the 

 bases of the fifth legs and about as wide as the fourth segment. Uro- 

 some about half the length of the metasome ; genital segment widest 

 at the center and nearly as wide as long. The three abdominal seg- 

 ments the same width and length, with convex lateral margins; 

 caudal rami half the length of the anal segment, narrowed posteri- 

 orly, close together and parallel with each other. The inner ter- 

 minal seta is the longest and is about equal in length to the urosome. 

 Ovisacs slender and cylindrical, with bluntly rounded ends, and 

 nearly twice the length of the urosome. 



First antennae long and slender, basal portion not much enlarged 

 and bent at almost an exact right angle. Third segment of second 

 antenna considerably enlarged but not so long as the basal segment; 



