BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



Inferior antennae scarcely twice as long as the body, penultimate joint 

 of the peduncle armed inside with seven strong spines. Legs, on the 

 whole, resembling in structure those in the type species, though the 

 third and fourth pairs are somewhat less elongated, and the natatory 



FIG. 549. ILYARACHNA HIRTICEPS (AFTER SARS) . O, MANDIBLE, b, DORSAL VIEW OF FEMALE. C, 



MAXILLIPEDS. d, SECOND ANTENNA, e, FIRST ANTENNA. /, SECOND ANTENNA, g, SECOND LEG. h, 

 FIRST LEG. i, THIRD PLEOPOD. j, VENTRAL VIEW OF FEMALE, k, FOURTH PLEOPOD. I, ABDOMEN 

 (VENTRAL VIEW), m, FIFTH PLEOPOD. n, UROPOD. o, FIFTH LEG. p, SEVENTH LEG. 



legs more densely fringed with setae. Uropoda with the proximal 

 joint rather large, and somewhat widening distally, marginal seta? 

 about 20 in number, distal joint very narrow, linear. Color whitish 

 grey. Length of adult female 7 mm." G. O. SARS/' 



Crust, of Norway, II, 1899, p. 137. 



