4'.)(> 



JU'LLETIN 54, UNITED STATES NATIONAL MITSEUM. 



Inferior antenna^ sc-arccly twice as lono' a.s the l)ody, 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. 'vl'J.— Ilyarachna hikticeps (After Sars). a, Mandible. I), Dor.sal view of female, r, 

 Maxillipeds. d, Second antenna, e, First antenna. /, Second antenna, g, Second leg. /i, 

 First leg. i, Third pleopod. ,/, Ventral view of female, k, Fourth pleopod. I, Abdomen 



(VENTRAL view). 7», FIFTH PLEOPOD. «., UROPOD. O, FIFTH LEG. j), SEVENTH LEG. 



legs more densely fringed with set^e. Uropoda with the proximal 

 joint rather large, and somewhat widening distjilly, marginal setii? 

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

 grey. Length of adult female 7h mm." — G. O. Sars." 



a Crust, of Norway, II, 1S9VI, j). 137. 



