§6 Anonyx, Socarnes 



subequal, outer with sraall 2"^ Joint. Telson nearly twice as long as bvoad, 

 cleft three quarters of length, rather dehiscent. Fj. about 13 mm. 



North-Pacific (Japan). Depth 1419 in. 



33. Gen. Socarnes ßoeck 



1838 Änonyx {pa.Tt.), Kröyor in: Danske Selsk. Ath., f. 7 p.242 j 1847 Ephippiphora 

 (Sp. un.: E. kroyeri) (non Duponchel 1834, Lepidoptera!), A. White in: P. zool. »Soc. 

 London, «.15 p. 124 | 1871 Socarnes (Sp. un.: >'. vahli), A. Boeck in: Forh. Sclsk. 

 Christian., 1870 p. 99 | 1872 S., A. Eoeck, Skand. Arkt. Amphip., v.l p. 128 \ 1890 S., 

 G. O. Sars, Crii.st. Xorway, v.l p.43 | 1893 S., .J. Bonnier in: Bull. sei. France Belgiqae, 

 V. 24 p. 188. 



Body dorsally broad, laterally compressed. Side-plates rather large. 

 Autenna 1, joints of flagellum not numerous; antenna 2 short in Q. Upper 

 lip separated by rather deep incision from epistome and prominent beyond 

 it. Mandibular processes of lower lip not very divergent. Mandible, cutting 

 edge simple, molar very weak, palp attached behind it. Maxiila 1 normal. 

 Maxilla 2 with inner plate obliquely truncate. Maxillipeds normal, inner 

 plates obliquely truncate, outer rounded, 7**^ Joint small normal. Gnathopod 1 

 not subchelate. Gnathopod 2 elongate, subchelate. Peraeopods 3-5 successively 

 longer. Branchial vesicles with accessory lobes on one side only. Uropod 3. 

 rami of moderate size, outer 2-jointed. Telson deeply cleft. 



3 species accepted, 1 obscure. 



Synopsis of accepted species: 



iPleon Segment 3 with central triangulär pro- 

 jection of postero-lateral margins .... 1. S. bidentieulatus . . . p. 5(> 

 Pleon Segment 3 without triangulär pro- 

 tection — 2. 



(Antenna 1, accessory flagellum with more than 

 4 joints 2. S. vahlü p. 57 



I Antenna 1, accessorj' flagellum with not more 

 than 4 joints 3. S. erythrophthalmus . p "w 



1. S. bidentieulatus (Bäte) 1835 Gammarus nugax (err., non Cmicer n. Phipp» 

 1774!), J.C. Ross in: John Ross, App. sec.Voy., nat. Hist. p. 87 | 1S62 Lysianassa n., Bäte, 

 Cat. Amphip. Brit. Mus., p. 65 t. 10 f. 3 | 1858 L. bidetiticulata, Bäte in: Ann. nut. Hist., 

 ser. 3 v.l p. 362 | 1877 Anonyx bidenticulaüis, Miers in: Ann. nat. Hist., ser. 4 ?'. 19 

 p. 136 I 1885 & 86 Socarnes h., G. 0. Sars in : Norske Nordhavs-Exp., r. 6 Crust. I 

 p. 139, 276 t.l2 f.l; Crust. H p.38 1 1894 S.h., T. Stebbing in: Bijdr. Dierk., i:\l y.'d 

 1893 Ichnopus b., A. Della Valle in: F. Fl. Neapel, ?•. 20 p. 804 [ 1866 Lysianassa vahli 

 (part.), Goes in: Öfv. Ak. Förh., v. 22 p. 518 | 1871 Socarnes v. (part.), A. Boeck in: 

 Forh. Selsk. Christian., 1870 p. 100 | 1882 S. ovalis, Hoek in: Niederl. Arch. Zool., 

 suppl. 1 nr. 7 p. 42 t. 3 f. 29— 29r. 



Body deep and tumid. Head with lateral angles acute. Side-plate» 

 deep. Pleon segment 3 with postero-lateral margins showing 2 triangulär 

 projectioiis, of which the upper is larger, the lower small and sometimes 

 evanescent. Eyes narrow, reniform or sublinear, darkbrown. Antenna 1, 

 peduncle short and thick, 1^* Joint large. 2^ and 3^ veiy short, flagellum of 

 about 18 joints, the 1^* not very large. accessory flagellum 9-jointed, more 

 than half as long as primary. Antenna 2 in o more slender and scnrcely 

 longer than antenna 1, flagellum 17-jointed. Gnathopod 1, 6*^ Joint tapering. 



