Paroediceros, Halicreion 247 



Near to P. lynceus, biit frontal process less tumid, less long, lateral 

 coiners of head less produced, side-plate 1 foursided, eyes much smaller, on 

 apex of frontal process, briglit red. Autenua 1 in g , 1^* Joint scarcely longer 

 thau 2*^, flagellum with 8 joints, shorter than peduncle, but in ö twice length of 

 pedimcle, with 11 joints, many setose; antenna 2, flagellum in g as long as 

 peduncle, ind reaching end of body. Gnathopod 1, 2^ Joint fusiform, 6*^* about 

 3 times as long as broad, palm about half its length, Gnathopod 2 as in 

 P. lynceus, peraeopods more slender, finger long and (in 1^* — 4*^) falciform; 

 2^ Joint in peraeopod 5 less dilated. üropod 3, rami as long as peduncle, 

 narrow, quite unarmed. Telson similar, comparatively smaller. Colour light 

 yellowish, tinged with rose, with no browu markings. L. 10—11 mm. 



Arctic üeeaii (Varangerfjord (Vadsö), depth 36 — 146 m; Tromsö, depth 146 m; 

 Kvalö [XordlandJ: Spitzbergen, depth 7 — 55 m; Greenland; Iceland). 



8. Gen. Halicreion Boeck 



1871 Halicreion (Sp. un.: H. hngicaudatus). A. Boeck in: Forh. Selsk. Christian., 

 1870 p. 173 i 1876 H., A. Boeck, Skand. Arkt. Amphip., v.2 p. 294 | 1892 H., G. 0. 

 Sars, Crust. Norway, v.l p. 321 [ 1873 Halicrion, E. v. Martens in: Zool. Rec, u8 p.l90. 



Head produced to an acute deflexed rostrum. Side-plaites of moderate 

 size. Eyes contiguous at base of rostrum. Antenna 1 rather shorter thau 

 antenna 2. slender in 9 , in d robust with tumid short-jointed peduncle and 

 pt Joint of flagellum enormous. Mouth-parts as in Monoculodes (p. 258), except 

 that outer plates of maxillipeds are rather shorter and broader. Gnathopods 

 1 and 2 nearly alike, 6*^ joiut ovate, process of 5*^ rather uarrower and longer 

 in gnathopod 2 than in gnathopod 1. Peraeopods 1 — 5 as in Monoculodes; 

 5^'' much (not a little, as Boeck says) longer than 3*^ and 4**^. üropod 3 

 greatly elongate, projecting far beyond uropods 1 and 2. Telson very small. 



1 species. 



1. H. aequieornis (Norm.) 1869 Oediceros a., A.M.Norman in: Eep. Brit. 

 Ass., Meet. 38 p. 278 | 1893 O.a. (part.), A. Della Valle in: F. Fl. Neapel, ».20 p. 545 

 t. 58 f. 63, 64 I 1889 Monoculodes a., A. M. Norman in: Ann. natTHist., ser. 6 v.3 p.453 

 t. 20 f. 1 — 5 I 1871 Halicreion longicaudatus, A. Boeck in: Forh. Selsk. Christian., 1870 

 p. 173 \ 1876 H. l, A. Boeck, Skand. Arkt. Amphip., v.2 p.295 t. 21 f. 3 | 1892 H. L, 

 G. Ü. Sars, Crust. Norway, v. 1 p. 322 t. 113 f. 2. 



Eather slender and compressed. Rostrum somewhat compressed, reaching 

 a little beyond 1^^ Joint of antenna 1. Side-plate 1 scarcely expanded, 4*'* 

 not A'ery broad. Eyes oval, ill developed, light red, at base of rostrum. 

 Antenna 1 in O reaching end of peduncle of antenna 2, 2*^ Joint a little shorter 

 than 1^*, 3^ than 2*^, each with stiff diverging apical setae, flagellum shorter 

 thau peduncle, 5-jointed. Antenna 1 in d, 2^ and 3"* joints very short and thick, 

 flagellum twice as long as peduncle, 1^* Joint longer than other 4 combined, 

 with 2 rows of long sensory setae in dense tufts. Antenna 2 alike in ö 

 and Q , ultimate and penultimate joints of peduncle long, slender, subequal, each 

 subequal to 5-jointed flagellum. Gnathopod 1, process of 5*^^ Joint scarcely 

 reaching palm, which is rather oblique, longer than bind margin. Gnathopod 2 

 subequal to gnathopod 1, process of 5^^ Joint narrower, reaching palm, 6**^ Joint 

 also narrower, otherwise similar. Peraeopods not very setose. Peraeopods 1 and 2, 

 4*^ Joint little expanded, in lengih equal to 6*'^ a little longer than the finger. 

 Peraeopods 3 and 4, 2*^ Joint oval, with setae projecting from within distal half 

 of expansion, finger nearly equal to 4^^^ and fully equal to 6*^ Joint. Peraeo- 



