641 



Anterior pairs of pereiopoda with the basal joint scarcely expanded; the 3 

 posterior pairs rather elongated, last pair equalling in length the raesosome 

 and ceplialon combined. First pair of uropoda with tlie basal part nearly 

 smooth; that of •2nd pair fully half as long. Body whitish, pellucid, and 

 more or less variegated with a dark elaret-red pigment. Length of adult 

 male reaching 8 mm. 



ReniarJiS. — The present species, established by Sp. Bate, may be 

 easily distinguished by the very slender and elongated superior antennae, 

 and especially by the peculiarly contorted shape of the thumb like process, that 

 defines the palm of the posterior gnathopoda in the male. It is nearly 

 related to D. curticanda of Boeck. 



Occurrence. — I have met with tliis form not infrequently along the 

 whole Norwegian coast, from the Christianiafjord to Vadso, in depths ranging 

 from 20 to 50 fathoms. 



Distribution. — British Isles (Sp. Bate). 



9. Dulichia nordlandica, Boeck. 



(PI. 231, fig. 2, PI. 232, fig. 1). 

 Dulichia nordlandica, Boeck, Crust, amph. bor. & arct. p. 183. 



Body extremely slender and elongated, and quite smooth throughout. 

 Cephalon not vei-y large, and but slightly produced in front. Coxal plates 

 very small and but little different in the two sexes. Eyes imperfectlj^ deve- 

 loped, being leplaced on each side by a patch of whitish pigment, without 

 any trace of visual elements. Both pairs of antennae extremely slender and 

 elongated, and rather densely setiferous, the superior ones exceeding in length 

 the whole bod}'. Gnathopoda in female very slender and of a rather similar 

 shape, though the carpus is' somewhat shorter in the posterior pair, meral 

 joint in both pairs unusually elongated. Posterior gnathopoda in male rather 

 strongly built, with the propodos very lai'ge and somewhat curved, lower 

 edge setous and without any thumb-like process at the base, but produced 

 in front to an acute, anteriorly-pointing projection, above which occurs 

 another somewhat smaller one, dact^'lus very much elongated, and having at 

 the base inside a tuberculiform prominence. Anterior pairs of pereiopoda 

 comparatively slender, with the basal joint narrow; the 3 posterior pairs 

 very slender and elongated, last pair scarcely longer than the 2 preceding 

 ones, and having the propodal joint somewhat expanded in its proximal part, 

 and armed indside with a row of strong spines. Second pair of uropoda with 



