31 



marginal spines. The E. spinipes of Brady is unquestionably identical with 

 Boeck's species. 



Occurrence. I have found this form not unfrequently in the upper part 

 of the Christiania Fjord, as also in the Trondhjem Fjord, in depths ranging from 

 10 to 20 fathoms. Mr. Scott records it also from Finmark. 



Distribution. British Isles (Brady, Scott), coast of France (Canu), Novaya 

 Zemlia, Spitsberg (Scott). 



15. Ectinosoma neglectum, G. 0. Sars, n. sp. 



(PI. XVII, fig. 1). 



Specific Characters. Female. Very like the preceding species, but of 

 somewhat smaller size and less robust form of body. Cephalic segment about 

 the length of the 4 succeeding segments combined, and gradually narrowed in 

 front, rostral plate evenly rounded at the tip. Urosome considerably longer than 

 the exposed part of the metasome, posterior edges of the segments very finely 

 spinulose. Caudal rami somewhat divergent, nearly twice as long as they are 

 broad, apical setae not much elongated. Anterior antennae resembling in structure 

 those in E. Sarsi, being rather robust and 5-articulate. Anterior lip with an 

 acute recurved projection in front. Last pair of legs somewhat resembling those 

 in E. Sarsi, but with the distal joint more unequally trilobate, the outermost lobe 

 occurring considerably farther forward than the innermost, marginal setae both 

 of this joint and the inner expansion of the basal one much more elongated, 

 partly extending beyond the genital segment. 



Male considerably smaller than female, and easily recognizable by the 

 prehensile character of the anterior antennae, and by the subdivision of the genital 

 segment. 



Colour light brown or corneous, with dark reddish shadows in front. 



Length of adult female 1.30 mm., of male 0.70 mm. 



Remarks. This form is closely allied to E. Sarsi, and has most prob- 

 ably been confounded with it by other authors. On a closer comparison, it is 

 however found to differ rather markedly in the structure of the last pair of legs, 

 the marginal setae of which are much more elongated. In the living state it is 

 moreover at once distinguished from that species by its different colour. 



Occurrence. I have met with this form rather abundantly in several 

 places of the Norwegian coast, from the Christiania Fjord to Vadso. It is gene- 

 rally found in depths ranging from 10 to 20 fathoms, muddy bottom. No doubt 

 it will also be found to occur out of Norway. 



