710 Dulichia 



2. D. monacantha Metzg. 1875 D. m., Aug. Metzger in: Jahresber. Comm. 

 D.Meere, v.2j3 p. 296 t. 6 f. 8 a, b | 1888 D. m., T. Stebbing in: Rep. Voy. Challenger. 

 u29 p.445 i 1894 D. m., G. 0. Sars, Crust. Norway. v.l p.638 t.230 f. 1 | 1893 D.tuber- 

 culata (part.), A. Della Valle in: F. Fl. Neapel, u 20 p. 321. 



Body nearly as in D. porrecta (p. 712), especially in o, perhaps rather 

 more robust in d. Head very slightly produced in front. Side-plate 1 

 in (S produced foi'ward in long horn-like process. in g small, subquadrate. 

 Side-plate 2 nauch larger in ö than in Q , broadly quadrate with blunt front 

 corner. Eyes perhaps a little smaller than in D. porrecta, and antennae 1 

 and 2 rather less long, but in geueral as in that species. Gnathopod 1 as 

 in the species compared, but gnathopod 2 in d not nearly so slender and 

 elongate; 5*^ Joint rather massive, 6^^ only a little longer than 5*^, palm 

 rather short, defined by a long tooth, the cavity between that and the tooth 

 near finger-hinge being deep but not wide; finger of moderate length, over- 

 lapping palm, with a tubercle on inner margin very near the hinge. Peraeo- 

 pods 1 — 5 as in D. porrecta. Uropod 1, peduncle armed on outer margin 

 only with 4 distant spines. Colour light yellowish, variegated with dark 

 brown. L. 5^ — 7 mm. 



Arctic Ocean and North-Atlantic (Finmark, depth 38 — 95 m; West-Norway) ; 

 Skagerrak, depth 217 m; Kattegat (Great Belt and Aarhus Bay, depth 12 — 21 m). 



3. D. aretiea J. Murdoch 1885 D.a., J.Murdoch in: P. U. S. Mus., v.l p.521 | 

 1893 D. tuberculata (part.), A. Della Valle in: F. Fl. Neapel, v. 20 p. 321. 



Body smooth. Head slightly produced, forming an obtuse angie. Side- 

 plate 1 produced into a sharp spine projecting forward, the rest unarmed. 

 Eyes small, round, black. Gnathopod 2, 2*^ Joint dilated and armed with 

 2 teeth, 6**^ large, subtriangular, and armed on the edge with 2 long stout 

 teeth. Peraeopods 3 — 5 not specially long; 4*^* Joint as long as b^^ and 

 6*^ combined. üropod 2, outer ramus nearly twice as long as peduncle, 

 inner a little longer. Colour greyish. L. ?. 



Arctic Ocean (Alaska). Depth 9 m. 



4. D. macera 0. Sars 1879 D. tu., G. O. Sars in: Arch. Naturv. Kristian.. v.4 

 p. 464 I 1885 D. m., G. 0. Sars in: Norske Nordhavs-Exp., v. 6 Crust. I p. 220 t. 18 

 f. 2, 2a I 1893 D. m., A. Della Valle in: F. Fl. Neapel, f. 20 p. 322 t. 55 f. 11. 



Body very slim, unarmed. Peraeon segment 1 very short, the rest longer, 

 subequal. Head rather small, obtusely conical. Side-plate 2 the largest, but 

 all small, wide apart. Eyes rudimentary, represented only by an irregulär 

 aggregation of white pigment on each side of head. Antenna 1 probably 

 much longer than body; flagellum 6-jointed; accessory flagellum 6-jointed. 

 Antenna 2 rather longer than the body, densely setose with short setae; 

 flagellum longer than ultimate Joint of peduncle, 5-jointed. Gnathopod 1 

 slight, 5*11 JQjjj^ longer and stouter than the slenderly oval 6*^. Gnathopod 

 2 in d almost completely unarmed; 2^ Joint proximally very narrow, distally 

 rather dilated, 5*^ longer than broad, 6*'» oblong oval, with process standing out 

 at nght angles to its long axis close to base, at distal end having a sharp tooth, 

 finger strong, falciform, not reaching the basal process. Peraeopods 1 and 2, 

 2^ Joint linear. Peraeopods 3 and 4 (and 5?) very long and slender, 4*'^ Joint 

 much longer than 5*^ and 6*^ combined; finger apparently weak. Colour 

 whitish, translucent. L. 10*5 mm. 



Arctic Ocean (north of Vesteraalen Islands; between Bear Island and Finmark, 

 depth 842—1638 m). In the cold area. 



