^luüoculodes. Oediceroides 267 



loiiger than peduucle of anteima 2, 2'^ Joint as long as 1***^ or longer, flagellum 

 inQrathershorterthan peduncle, 9-jointecl. Antenna2, iiltimate Joint of peduncle 

 nearly as long as penultimate, both densely setose in o, not in ö, flagellum 

 in Q nearly as long as peduncle, in d-very long, filiform. Lower lip with a 

 Single central lobe (Boeck). Maxiila 1, outer plate with 6 spines (Schneider). 

 Gnathopod 1, process of 5*'' Joint short, broad, not reaching palm, 6^*' Joint oblong 

 oval, little expanded distally, palm ill-defined, about as long as bind margin. 

 Gnathopod 2, process of 5*'^ Joint about reaching palm, 6*'' Joint more than 

 twice as long as broad, a little expanded distally, palm ill-defined. Peraeo- 

 pods 1 — 4, finger, especially in S^ and 4*^ very long, longer than G**' Joint. 

 Peraeopod 5, 2*^ Joint broad above, fringed with delicate setae, 5*'^ Joint shorter 

 than 4*'^ üropod 3, rami unarmed, about as long as peduncle. Telson oblong 

 oval, little tapering, apically rounded with 2 adjacent spinules. Colour whitish" 

 pellucid, orange on back, antennae banded with orange; ova rose-coloured, 

 L. 7—12 mm. 



Arctic Ocean, North»Atlantic, North-Sea and Skagerrak (Xorway, depth 19—188 rn ; 

 Firth of Clyde, depth 75 m). 



18. M. tenuirostratus Boeck 1871 M.t., A. Boeck in: Forh. Selsk. Christian., 

 1870 p. 167 I 1876 M. t., A. Boeck, Skaud. ArM. Amphip., v.2 p. 276 t. 14 f. 4 | 1892 

 M.t., G. 0. Sars, Crust. Norway, v.l p.309 1. 109 f. 2 \ 1893 Oediceros aequicornis (part.), 

 A. Della Valle in: F. Fl. Neapel, v. 20 p. 545. 



Nearly allied to M. packardi. Frontal process evenly curved, rostral 

 part very long and narrow, nearly reaching apex of 1^* Joint of antenna 1. 

 Side-plate 1 distally expanded. Eyes at base of frontal process, faiut in 

 alcoholic specimens. Antennae 1 and 2 elongate. Antenna 1, 2*^ Joint much 

 longer than l^S flagellum shorter than peduncle, 12-joiuted. Antenna 2 in 9 

 scarcely longer than antenna 1, ultimate Joint of peduncle shorter than pen- 

 ultimate, flagellum shorter thau peduncle. Gnathopods 1 and 2 iuuch strenger 

 than in M. packardi. Gnathopod 1, process of 5*'' Joint large, broad. very 

 setose, reaching palm, <>t'^ Joint widened distally, palm well defined. Gnatho- 

 pod 2, process of 5^'' Joint reaching palm, 6*^'' Joint scarcely more than twice 

 as long as broad, widened distally, palm about as long as bind margin. 

 Peraeopods nearly as in M. packardi. Telson oval triangulär, strongly tapering 

 to obtuse point with 2 spinules. L. o 8 mm. 



Christianiafjord [Norway], North-Atlantic. 



M. deiuissus Stimps. 1853 M. d., Stimpson in: Smithson. Contr., v. (i nr. 5 

 p.54 I 1893 M. d., A. Della Valle in: F. Fl. Neapel, v.20 p. 556. 



L. 9 mm. 



Fundy Bay (Duck Island, Grand Manan). Depth 7 m. 



18. Gen. Oediceroides Stebb. 



1888 Oediceroides, T. Stebbing in: Rep. Voy. Challenger, v.29 p. 843 | 1892 0., 

 G. 0. Sars, Crust. Norway, v. 1 p. 287. 



Head with frontal process conspicuously developed (Fig. 67). Side- 

 plates not very large, 1^^ expanded distally, produced forward. Eyes, when 

 present, elongate, contiguous, on frontal process. Antenna 1 much shorter 

 than antenna 2 (Fig. (>7). Mouth-parts nearly as in Oediceropsis (p. 252), 

 but inner plate of maxilla 1 more strongly developed, carrying from 

 3 — 8 plumose setae, outer plate with 9 spines. Gnathopods 1 and 2 nearly 



