Oediceropsis, Acanthostepheia 253 



verv large, flagellum of many short calceoliferous joints botli in 9 and ö. 

 Upper lip with margiu evenly convex. Mandibular palp elongate. Maxilla 2, 

 inner plate much wider than outer. Plates of maxillipeds rather broad in 

 Proportion to length. Gnathopods 1 and 2, 5^^ Joint short with rather small 

 setose lobe, 6**1 long ovate, palm much longer than bind margin. Peraeo- 

 pods 1 and 2 feeble. Peraeopods 3 and 4 strong. üropod 3, rami longer 

 than peduncle. Telson very small. 



1 species. 



1. O. brevicornis Lillj. 1865 0. h., W. Lilljeborg in: X. Acta Soc. Upsal., 

 ser. 3 i: 6 nr. 1 p. 19 | 1876 0. b., A. Boeck, Skand. Arkt. Amphip., v. 2 p. 297 1. 13 f. 2 | 

 1892 O.b., G. 0. Sars, Crust. Xorway, v.l p. 325 t. 114 | 1893 Oediceros b., A. Della 

 Valle in: F. Fl. Neapel, v. 20 p. 543 t. 58 f. 50—52. 



Head with minute rostrum and sinuous margin on each side below it. 

 Side-plate 1 densely setose, 4*^ very broad distally. Eyes rounded triangulär, 

 light red, no distinct lenses. Antenua 1 only reaching middle of penultimate 

 Joint of peduncle of anteuna 2, 1^* Joint longer than 2^, flagellum shorter than 

 peduncle. 10-jointed. Autenna 2, penultimate Joint of peduncle with conspicuous 

 spine at apex, ultimate only about half as long, with 5 large spines, flagellum 

 shorter than peduncle, very flexible. Mandibular palp nearly twice as long as 

 trank of mandible. Gnathopods 1 and 2, palm nearly 4 times as long as bind 

 margin. slightly defined, set with setae and spinules; palm and finger rather 

 longer in gnathopod 2. Peraeopods 1 — 4 very setose, finger slender, long. 

 Peraeopods 1 and 2, 5*^ Joint longer than 4*'^ or 6*^. Peraeopods 3 and 4, 

 5*'i Joint shorter than 4*^^; peraeopod 4, 6*^ Joint and finger elongate. 

 Peraeopod 5, 2^ Joint expanded, tuffcs of spinules on others. üropod 3 not 

 reaching beyond-the others. Telson oval quadrangular., Colour pale flesh- 

 tinge, pellucid. L. Q 11 mm. 



North-Atlantic and Arctic Ocean (West-Norway, to Lofoten Islands). Depth 

 94—564 m. • 



13. Gen. Acanthostepheia Boeck 



1871 Acanthostepheia (Sp. un.: A. mahngrcni)^ A. Boeck in: Forh. Selsk. Christian,, 

 1870 p.l63 I 1876 A., A. Boeck, Skand. Arkt. Amphip., u2 p.262 | 1894^., T. Stebbing 

 in: Bijdr. Dierk., v. 17 p.24 ] 1873 Acanthostephia, E. y. Martens in: Zool. ßec, v.8 p. 190. 



Carinate, peraeon broad, pleon compressed. Rostrum long, tapering, 

 carinate, about reaching apex of 1*** Joint of antenna 1. Side-plate 1 distally 

 expanded, 5*^ as large as the 4:^^. Eyes separated by carina of head, large, 

 oval or reniform, prominent. Antenna 1 shorter than antenna 2, 2"^ Joint 

 shorter than 1^*. Mouth-parts nearly as in Monoculpdes (p. 258). Gnatho- 

 pods 1 and 2 similar, 5*'» Joint rather short, with prominent round-ended 

 process, 6**^ large oval, the oblique palm much longer than bind margin, finger 

 as long as palm. Peraeopods 1 and 2, finger small. Peraeopods 3 and 4, 

 flnger rather large, lanceolate. üropod 3, rami 410t longer than peduncle. 

 Telson short, quadrate. 



2 species accepted, 1 doubtful. 



Synopsis of accepted species: 



Ej^es divergent : 1. A. malmgreni . p. 254 



Eyes parallel 2. A. pulchra . . . p. 254 



