478 



with a j'ellowisli tinge, and more or less distinctly mottled with brown and 

 pink, uropoda generally very dark coloured. Length of adult female scarcely 

 attaining 4 ram. 



RemarJis. — This species, established by Boeek, is easily distingiiishable 

 from the preceding one by its small size and comparatively stout form of 

 body, as also by the rather different shape of the basal joints of the 3 

 posterior pairs of pereiopoda. The form described by Sp. Bate as D. 

 tcniiicornis is most probably identical with the present species. 



Occurrence. — I have met with this form rather frequently in 

 numerous places on the Norwegian coast, from the Christianiafjord to Vadso. 

 It generally occurs in comparatively shallow water, among algae. 



Disfribiifion. — Shetland Isles (Norman), British Isles (Robertson), 

 Kattegat (Meinert), coast of France (Chevreux). 



Gen. 4. Tritseta, Boeck, 1876. 



Syn. ; Atyliis, Sp. Bate (part). 

 » Liimpra, Boeck. 



Body .scarcely compressed, and having the segments of metasome nut 

 |ir(i(Iaccd dorsally. Cephalon comparatively small and truncated in front, 

 with the rostrum nearly obsolete. Coxal plates ver\' small, and jmrtly of 

 irregular angular form. Eyes well developed and placed as in Dexamhie. 

 Antennpe very slender and subequal in length, the superior ones with greatly 

 elongated peduncle, and without any accessory appendage. Oral parts on 

 the whole resembling those in the genus Dexamine. Gnathopoda likewise of 

 a very similar structure. Pereiopoda very strongly built and subequal in length, 

 with the meral joint in all very much elongated, and the 2 outer ones modified 

 so as to make them admirably adapted for grasping, basal joint of the Sl 

 posterior ones but little expanded. Branchial lamellae simple. Uropoda and 

 telson about as in Bvxamine. 



liemarlis. — This genus was first established by Boeck in the year 

 187U, but as the name he proposed, Lampra, was already appropriated in 

 Zoology, he changed it subsequently to Trikcia. It is nearly allied to 

 Dexamine^ yet differing rather markedly in the small size of the coxal plates, 

 the equal-sized antennae, and the peculiar structure of the 'pereiopoda. Besides 



