Dulichia 709 



Peraeopods 1 and 2, 2d Joint not produced into 



a tooth 2. D. monacantha . p. 710 



Peraeopods 1 and 2, 2d Joint produced into a tooth 3. D. arctica .... p. 710 



J Eyes without visual elements — 5. 

 \ Eyes with visual elements — 6. 



{Gnathopod 2 in <S, defining tooth of palm at right 

 angles to long axis of ihe 6th Joint 4. D. macera . . . p. 710 

 Gnathopod 2 in cJ. defining tooth of palm not at 

 right angles to long axis of the 6th joint . . 5. D. hirticornis . . p. 711 



{Eyes vci-y small 6. D. normani . . . p. 711 

 Eyes not very small — 7. 



{Gnathopod 2 in cj, öth Joint without thumb-like 

 process near base 7. D. nordlandica . p. 711 

 Gnathopod 2 in (5, tJth joint with thumb-like process 

 near base — 8. 



{Gnathopod 2 in (J, 6th joint with thumb-like 

 process contorted 8. D. falcata . . . . p. 712 

 Gnathopod 2 in S, 6*^ Joint with thumb-like 

 process not contorted — 9. 



( Gnathopod 2 in (5, finger very long 9. D. porrecta . . . p. 712 



\ Gnathopod 2 in (5, finger not very long .... 10. D. tuberculata . p. 713 



1. D. spinosissima Kreyer 1845 D.s., Kreyer in: Naturh. Tidsskr., ser. 2 v.l 

 p. 512 t. 6 f. la— h I 1846 D.s., Krayer in: Voy. Nord, Crust. t. 22 f. la— u | 1876 

 D.s., A. Boeck, Skand. Arkt. Amphip., v.2 p.651 | 1893 D.s., A. DellaValle in: F.Fl. 

 Neapel, t?.20 p.324 t.55 f. 15, 16 | 1894 D. s., G. 0. Sars, Crust. Norway, v.l p.63o t.228. 



Peraeon segments produced to acute lateral points; last peraeon 

 Segment and pleon segments 1 and 2 each with a pair of tubercular medio- 

 dorsal prominences; pleon segment 3 produced backward in a long slightly 

 curved tooth. Head very large; carina produced to a lamellar acute-ending 

 rostrum; post-antennal corners acutely produced. Side-plates projecting 

 acutely foi-ward, 2*^ acutely bilobed, 3^ and 4*^ acute below. Eyes large, 

 prominent, acute at centre, dark red. Antenna 1 densely setose (setae not 

 very long), nearly as long as the body (Kr0yer: about IV2 of body); 2<^ joint 

 more than twice as long as 1^*, obtusely produced at apex, 3* rather 

 longer, as long as the 5-jointed flagellum; accessory flagellum 3-jointed. 

 Antenna 2 shorter and naiTower, ultimate and penultimate joints of peduncle 

 each obtusely produced at apex, flagellum shorter than ultimate, 3-jointed. 

 Gnathopod 1, 5*^ joint very setose on bind margin, narrowing distally, longer 

 and rather broader than the setose 6*^ which slightly widens distally; finger 

 long, denticulate on inner margin. Gnathopod 2 in d, 2*^ joint produced 

 in front to a triangulär distal lobe, 5*^ cup-shaped, setose on bind margin, 

 6*^ broad, oval quadrangular, bind margin pretty well developed, palm defined 

 by a strong tooth, and having a smaller oue near the finger-hinge; finger 

 strong, densely setose, overlapping palm. Gnathopod 2 in 9 less powerful; 

 6*^ Joint rather broadly oval, without teeth. Peraeopods 1 and 2 small and 

 feeble; 2*^ joint very little dilated. Peraeopods 3 — 5 long, strong; 4**^ joint 

 subequal to 5*^ and 6*^ combined, which are densely spinöse; finger sti'ong. 

 üropods 1 and 2, rami narrow, acute, spinöse. Telsou rather longer than 

 broad, with 2 setules on each side, apex narrowly rounded. Colour whitish, 

 pellucid, with irregulär brown and light yellow markings. L. 9 12 — 31 mm. 



Arctic Ocean (Greenland, Spitzbergen, Finmark, Tromsö). Depth 20 — 300 m. 



