356 



cies is easily distinguishable by its slender and perfectly smooth body and the 

 greatly elongated superior antennae. In the living state the absolute want of 

 any pigmentary ornament will also serve for readily recognizing the species. 

 Occurrence. — I have met with tins form in several places off the 

 west coast of Norway, as also in the Trondhjemsfjord, and as far north as 

 Selsevig, lying exactly within the polar circle. It is a true deep water 

 form, occTirring only in depths ranging from 80 to 150 fathoms. Particularly 

 where the great Alcyonarian Faragorgia arhorea grows, this is form found in 

 great abundance clinging to its branches. Boeck also collected it in the 

 Christianiafjord. Out of Norway it has not yet been recorded. 



9. Stenopleustes nodifer, G. 0. Sars. 



(PI. 126, fig. 2). 

 Amphithopsis nodifera, G O. Sars, Oversigt af Norges Crustaceer, I, p. 103, PI. 5, fig. 6. 



Form of body about as in tbe preceding species, back evenly rounded 

 anteriorly, but having posteriorly, on each of the 2 anterior segments of 

 metasome, 2 juxtaposed obtuse, nodiform projections issuing from the hind 

 dorsal margin of those segments. Cephalon with the rostral projection a 

 little more produced than in S. Ifalmgrc.ni, lateral corners not angular, but 

 narrowly rounded at tlie tip. Coxal 'plates nearly as in tliat species, except 

 that the 4th pair appear somewhat narrower in proportion to their depth. Last 

 pair of epimeral plates of metasome somewhat produced at the lateral corners. 

 Eyes large, and pronouncedly reniform in shape, visual elements very conspi- 

 cuous, pigment dark red. Superior antennae greatly elongated, 1st joint of the 

 peduncle somewhat longer than the other 2 combined. Inferior antennae scarcely 

 half as long as the superior Gnathopoda feeble in structure, and- very like 

 those in tlie preceding species, except that the palm of the propodos is rela- 

 tively somewhat shorter. Pereiopoda likewise of mu^'h the same appearance 

 as in that species, basal joint of last pair, however, considerably larger than 

 that of the 2 preceding pairs and having the posterior edge but very little 

 curved Last pair of uropoda about as in S. Mahngrem. Telson somewhat 

 more elongated, and considerably narrowed in its outer pai't, tip bluntly 

 pointed. Body whitish, pellucid, more or less densely speckled with a yel- 

 lowish and brownish pigment, peduncles of the superior antennae, as also the 

 uropoda generally dark brown. Length of adult female about 5 mm. 



RemarJis. — This form was at first described by the author under 

 the name of Ampliithopsif: nodifera. It is indeed very closely allied to the 

 AmphUhopsis Muhmjreui of Boeck, but as the latter form has turned out not 

 to be a true AmpiliUhopfiis, the generic name of tlie present species must be 



