129 



joint very narrow, equalling in length V of the basal joint, .Flagellum of 

 inferior antennae in female shorter than the 2 outer joints of the peduncle 

 combined, and 8-articulate ; in male very elongate and slender, considerably 

 exceeding the length of the body. Anterior gnathopoda with the propodos 

 broadly oval and much shorter than the carpus. Antepenultimate pair of 

 pereiopoda with the meral joint considerably expanded and edged with numer- 

 ous ciliated setae; the 2 outer joints combined equalling the length of the 

 meral one, The 2 posterior pairs of pereiopoda with the basal joint about 

 half the length of the remaining part of the leg. Last pair of uropoda with 

 the basal joint of the outer ramus slightly dilated in its distal part, terminal 

 joint about l /3 as long and setous on both edges. Each half of the telson 

 sublinear with about 9 apical spines and 4 lateral. Body pellucid and nearly 

 colourless. Length of adult female 7 mm; of male 8 mm. 



Remarks. - - This is by far the largest and finest of the species of 

 Bathyporeia occurring off the coast of Norway, and I have therefore selected 

 it for the anatomical analysis of the oral parts. The species may be readily 

 known from any of the others, not only by its much larger size, but also by 

 the form of the last pair of epimeral plates of the metasome, the lateral 

 corners of which, in both sexes, are drawn out to a distinct dentiform projec- 

 tion. The form described by Boeck as B. pilosa would seem to be this species. 

 At least some specimens preserved in our University Museum and determined 

 by Boeck as above, undoubtedly belong to the present form. 



Occurrence. - I have myself hitherto only met with this species in a 

 single locality, viz., in the Ognebugt off Jaederen, south coast of Norway. It 

 occurred here in considerable numbers on a bottom of fine sand, depth from 

 2 to 6 fathoms. The great ability of the animal in burying itself rapidly 

 within the loose bottom deposit, was often observed on keeping some spe- 

 cimens in a glass jar with some sand at the bottom. The above mentioned 

 specimens preserved in our University Museum were collected by Boeck 

 at Farsund. 



5. Bathyporeia pelagica, Sp. Bate. 



(PI. 44, fig. 1). 



Bathyporeia pelagica, Sp. Bate, Cat. Amphip. British Mus. p. 174, PI. XXXI, lig. G (male) 



Syn : Bathyporeia pilosa, Stebbing (not Lindstrom). 

 Bathyporeia teuuipes, Meiuert. 



Body comparatively more slender and compressed than in the preccd 

 ing species, especially in the male. Cephalon fully as long as the first 

 segments of mesosome combined, lateral corners obtusely rounded. First pair 



17 Crustacea. 



