132 



B- RoberL^onii. but in this case the calceolse are always wholly absent, and 

 replaced hy simple bristles (see tig. 1 . a 2 (^ -h). The present species is, more- 

 over, at once distinguished from the former by the dark pigment of the eyes, 

 and by the absolute want of spines on the 1st segment of the urosome. 



Occurrence. — Of this form only 3 specimens have come under my 

 notice, all of which were adult males. They were found at Sorvaer, west 

 coast of Finmark, in a depth of 3 — 6 fathoms, sandy bottom. 



Distribution. — British Isles (Cumbrse), Shetland Isles (Jeffreys), coast 

 of France (Chevreux). 



7. Bathyporeia gracilis, (i. 0. Sars, n. sp.. 



^Pl. 45, fig. 1). 



Body rather slendei' in form, though not very much compressed. C'epha- 

 lon about the length' of the first 2 segments of mesosome combined, truncated 

 in front, the lateral corners obtusely rounded. First pair of coxal plates 

 rather narrow, obtusely pointed at the tip; the 3 succeeding pairs scarcely 

 deeper than the body. Last pair of epimeral plates of metasome regularly 

 rounded at the lateral corners. First segment of urosome very slightly im- 

 pressed dorsally, and having 2 pairs of very small spines, besides 2 anteriorly 

 curved bristles. Eyes imperfectly developed, and not at all visible in alcoholic 

 specimens. Superior antennge with the 1st joint of the pediuicle about as 

 long as the other 2 combined; flagellum in female composed of 6, in male of 

 8 articulations; accessory appendage with the terminal joint very small, scarcely 

 exceeding in length Vs of the basal one, the latter with the inner edge 

 smooth. Inferior antennte in female fully twice as long as tlie superior, 

 flagellum very slender, about the length of the 2 outer peduncular joints 

 combined, and composed of 8 articulations coarseh' spinous at the end anteriorly ; 

 those of male scarcely longer than in female, flagellum com^iosed of 13 arti- 

 culations, the first 5 of which are provided with distinct calceolge. Anterior 

 gnathopoda with the propodos much .shorter than the carpus and regularly 

 oval in form. The 3 posterior pairs of pereiojjoda mucli more slender than 

 in any of the other species known; antepenultimate pair with the raeral joint 

 but little expanded and scarcely as long as the 2 outer joints combined; the 

 2 last pairs with the carpal and propodal joints very elongate and narrow. 

 Last pair of uropoda with the terminal joint of the outer ramus about equal- 

 ling in length Vs of the basal one and having both edges smooth. Lobes of 

 the telson rathei' narrow, each with only 4 apical spines and 2 lateral. Co- 

 lour not stated. Length of adult female 6 mm; of male about the same. 



