202 

 ?i. Stegocephaloides christianiensis, Boeck. 



(PI. 70, fig. 2). 

 Stegoccphnlus christianiensis, Boeck, Crust, umphip. bor. & arctica p. 48. 



Body short and stout, with broadly vaulted back. Ceplialon forming 

 in front a very short rostral projection, lateral corners produced to an acute 

 point. C!oxal plates rather deep, 4th pair very large, nearly as broad as they 

 are deep, posterior expansion fully encompassing the succeeding pair inferiorly, 

 and narrowly truncated at the tip, distal edge forming inferiorly an abrupt, 

 nearly angular curve. Last pair of epimeral plates of metasome somewhat 

 produced at the lateral corners, tip minutely bidentate. Superior antenna? 

 witli the 1st joint of the peduncle twice the lengtli of the other 2 combined, 

 fiagellum half as long again as the peduncle, with the 1st joint very large 

 and laminar, longer than the 2 succeeding joints coml)ined, accessory ap- 

 pendage small, scarcely attaining half the length of the 1st joint of the 

 fiagellum. Inferior antennae with the 2 last joints of the peduncle about 

 equal-sized. Gnathopoda nearly exactly alike, propodos in botli longer than 

 the carpus. Last pair of pereiopoda witli the basal joint about the length 

 of the lemaining part of the leg, posterior edge serrated, and strongly 

 curved at the middle, deflexed lobe obtusely pointed, and scarcely 

 reaching bej^ond the meral joint, propodos rather elongated, about the 

 length of the 2 preceding joints combined. Telson oblong oval, l)ut 

 slightly tapering distally, cleft nearly extending to the middle. Coloiir dark 

 greenish brown from numerous pigmentary spots, mostly crowded together 

 into angular patches alternating with each other, and thus giving the body 

 a peculiar tessellated appearance. Length of adult female 7 mm. 



Iicniarls. — The jiresent species, first described l)y Boeck, and referred 

 by him to the genus Sfrf/orrpJuiliif:, may be regarded as the type of the 

 present new genus. It is readily recognized, when alive, by its dark greenish 

 brown colour, and by the peculiar regular manner in which the pigment is 

 arranged. 



Occurrence. — OIF the south and west coast of Norway, this species 

 is by no means rare in moderate depths, from 20 to 100 fathoms, occurring in 

 some places, even in great abundance. It extends northwards along the 

 Nordland coast, at least to the Lofoten isles. 



Disirihution. — Bohuslan (Malm); Stat. 137 of the Norwegian North 

 Atlantic Expedition (a few specimens, more than twice the nsual size, per- 

 haps belonging to a nearly allied new specie.s). 



