202 

 3. Stegocephaloides christianiensis, Boeck. 



(PI. 70, fig. 2). 

 Stegocephalus christianiensis., Boeck, Crust, amphip. bor. & arctica p. 48. 



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

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

 point. Coxal 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 antennae 

 with the 1st joint of the peduncle twice the length of the other 2 combined, 

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

 and laminar, longer than the 2 succeeding joints combined, accessory ap- 

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

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

 equal-sized. Griiathopoda nearly exactly alike, propodos in both longer than 

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

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

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

 reaching beyond the meral joint, propodos rather elongated, about the 

 length of the 2 preceding joints combined. Telson oblong oval, but 

 slightly tapering distally, cleft nearly extending to the middle. Colour 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. 



Reniarl'x. The present species, first described by Boeck, and referred 

 by him to the genus Stegocephalus, 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. Off 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. 



Diufn'lnfioii. Bolmslan (Malm); Stat. 137 of the Norwegian North 

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

 haps belonging to a nearly allied new species). 



