üdius, Panoploea 211 



Integument indurated, body compressed, carinate. Head, lateral corners 

 well developed. Side-plates 1 — 4 rather large. Aiitennae 1 and 2 veiy short. 

 Upper lip naiTow, tapering, minutely bifid. Lower lip without inner lobes, 

 outer acutely produced. Mandible produced to acute cutting edge, spine-row 

 long, spines short, molar distinct, small, palp slender, almost unarmed. 

 Maxilla 1, inner plate small, tapering, outer elongate, tapering to acute 

 point, palp a minute conical Joint. Maxilla 2, both plates long, narrow, 

 obliquely truncate, inner the shorter. Maxillipeds, inner plates long, narrow, 

 outer reachiug mucli beyond 2*^ Joint of palp, palp not long, finger minute. 

 Gnathopod 1 feeble, slender, minutely clielate. Gnathopod 2 rather robust, 

 subchelate. Peraeopods 1 — 5 stout, subequal, peraeopods 3 — 5, 2^ Joint 

 expanded. üropod 3, rami very unequal. Telson oblong, minutely incised. 



1 species. 



1. O. earinatus (Bäte) 1862 Otus c, Bäte, Cat. Amphip. Biit. Mus., p. 126 

 t. 23 f. 2 1871 Odius c, A. Boeck in: Forh. Selsk. Christian., 1870 p. 182 | 1893 0. c, 

 G. O. Sars, Crust. Xorway, v.\ p. 381 t. 133 f. 2 | 1893 0. c, A. DellaValle in: F. Fl. 

 Neapel, r. 20 p. 582 t. 58 f. 86, 87. 



Short and stout but highly compressed, carinate from peraeon segment 1 

 to pleon segment 3, on pleon segment 2 with obtusely rounded projection, 

 on segment 3 with erect acute process. Head, rostium acute, vertical, well 

 overlapping 1*** Joint of antenna 1, lateral corners fonning a large ti'iangular 

 lobe. Side-plate 1 tapering to obtuse point, 2*^ and 3*^ slightly narrowed below, 

 4*^ broad below, bind margin oblique below emargination, o^^ and 6*^ with 

 bind lobe truncate. Pleon segment 3, postero-lateral angles acutely but slightly 

 produced, a sharp curved tooth higher up below a deep sinus. Eyes reniform, red. 

 Antenna 1, 1^* Joint subequal to 2'^ and 3*^ combined, flagellum much shorter than 

 peduncle, with 7 joints, last 3 very small, with long sensory filaments. Antenna 2 

 shorter, flagellum scarcely longer than ultimate Joint of peduncle. Gnathopod 1, 

 2*1 Joint widened proximally, rest of limb very slender, 5*^ Joint narrow, 

 much longer than 6*^, which is curved and forms a very small chela, Gnatho- 

 pod 2, 4*^^ Joint produced into a narrow lobe, 5*'^ short, cuplike, but narrowly 

 produced, 6*^ broad, widening distally, palm nearly ti'ansverse, finely denticulate. 

 Peraeopods 1 — 5, 4*^ Joint strongly produced over 5*^, finger streng, curved, 

 peraeopods 3 — 5, 2<^ Joint quadrate, lower bind angle broadly emarginate 

 or slightly bilobed. Uropod 3, outer ramus much uaiTower than inner, and 

 little more than V2 äs long, Telson more than twice as long as broad, 

 tapering to minutely incised apex. Colour whitish or variegated with dark 

 brown shadings. L, 9 about 5 mm, 



Arctic Ocean, North-Atlantic, Xorth-Sea and Skagerrak (Greeuland, Spitzbergen. 

 Arctic America, Xorway, Shetland Isles). Moderate depths to 113 m; on rocky bottom, 

 among Algae and Hydroids. 



2, Gen. Panoploea G, M. Thoms. 



1880 Panoploea (part.), G. M. Thomson in: Ann. nat. Hist., ser. 5 u 6 p. 2 | 1881 

 Panoplaea, G. M. Thomson in: Tr. X. Zealand Inst., u 13 p. 212 : 1893 Iphimediopsis 

 (Sp. un.: I. eblanae), A. DellaValle in: F. Fl. Xeapel, f. 20 p. 585. 



Back broadly rounded, some segments produced into teeth, Rostrum 

 acute, Side-plates 1 — 3 more or less acutely tapering, 4*^ with projecting 

 point of bind margin, Upper lip somewhat narrowed distally, Lower lip without 

 inner lobes, outer incised on inner margin near apex. Mandible narrowly 

 tapering to cutting edge, accessory piate narrow, no spine row, molar exceedingly 



14* 



