NO. 1788. NORTE AMERICAN EROASILID.l^— WILSON. 377 



Color a clear cartilage gray without pigment markings. 



Total length, 1.12 mm. Carapace, 0.40 mm. long and wide. Free 

 thorax segments, 0.40 mm. long, the first and second 0.28 mm. wide. 

 Genital segment 0.17 mm. long, 0.15 mm. wide. 



A single lot of this species obtained from the nostrils of the cod off 

 the coast of vScotland, and containing a male and three females, was 

 sent to the author by A. Scott, esq., of the Fishery Board of Scotland. 

 For this courtesy, as well as for permission to include a description 

 of the hitherto unloiown male in the present paper, the sincere thanks 

 of the author are hereby tendered. 



This lot of specimens has been placed in the National Museum and 

 is numbered 38618, U. S. N. M. 



BOMOLOCKUS EXILIPES, new species. 

 Plate 58; text-figure 10. 



Female. — General body form small and slender; cephalothorax 

 semielliptical, nearly twice as wide as long and slightly rounded pos- 

 teriorly. First antennae projecting so that nearly all the basal 

 portion is visible in dorsal view; the bases of these antennae are well 

 separated with a rounded rostrum protruding a little between them. 

 Second thorax segment nearly as wide as the carapace, but short; 

 third segment longer and considerably narrower; fourth segment 

 also much narrowed and partly concealed beneath the third segment; 

 fiftli segment the same width and length as the fourth, projecting 

 strongly on either side at the bases of the fifth legs. Genital seg- 

 ment about as wide as the fifth segment, barrel-shaped, with strongly 

 convex sides. Abdomen three-jointed, joints diminishmg evenly in 

 width, the fu'st two the same length, the terminal one a little longer. 

 Anal lamiiiffi oblong, about half the length of the last segment, each 

 tipped with three unequal setae, the inner and longest of which is as 

 long as the genital segment and abdomen combined. Egg-cases long 

 and narrow, two-thirds of the entire length, and two-thirds as wide 

 as the genital segment; eggs in six or eight longitudinal rows, about 

 70 eggs in each case. 



First antennae distinctly six-jointed, slender, and not reaching far 

 beyond the lateral margins; the base for insertion is rather long 

 and narrow, causing the appendages to project well in front of the 

 carapace. The basal joints are fringed along their anterior border 

 with a dense row of flattened plumose setae and a couple of tactile 

 hairs. The terminal joints are only sparingly suppKed with short 

 setae which are nonplumose. The second antemiae have the basal 

 joint longer than the other two, the second joint very short, the 

 terminal joint armed with the usual longitudinal rows of spines. 

 The last joint terminates in five claws of different lengths and a 



