129 



joint xpvy narrow, e(jualliiig in lengtli Vs ot' the l)asal joint. Flagellum of 

 interior antennae in female shorter tlian the 2 outer joints of the peduncle 

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

 exceeding the lengtli of the body. Anteinor gnathoiooda with the propodos 

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

 pereiopoda with the meral joint con.'^iderably expanded and edged with numer- 

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

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

 Imlf the length of the remaining part of the leg. Last pair of uropoda wdtli 

 tlie basal joint of the outer ramus slightly dilated in its distal pai't, terminal 

 joint about '/s as long and setous on both edges. Eacli lialf 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. 



liemarks. — 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 jiarts. The species may be readily 

 known from an^' of the otliers, not only by its much larger size, but also by 

 tlie foi-m of the last jiair 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 s])ecies. 

 At least some specimens pi'eserved in our University Museum and determined 

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



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

 single locality, viz., in the Ognebiigt off Jtederen, 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 rapidlA- 

 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 presei'ved in our University Museiim were collected b\' Boeck 

 at Farsund. 



5. Bathyporeia pelagica, Sp. Bate. 



(PI. 44, fig. 1). 

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

 Syn ; Battiyporeia pilosa, Stebbing (not Lindstrom). 

 » Bathyporeia tenuipes, Meinert. 



Body comparatively more slender and compressed than in the preced- 

 ing species, especially in the male. Cephalon fully as long as the first 2 

 segments of mesosome comliined, lateral coi'ners obtusely rounded. First pair 



17 — Crustacea. 



