Natural History of East Finmarh. 15 



Description of the female. — Length about '74 millim. (^^ of 

 an inch). Its general appearance is that of a small Caatko- 

 camjitus. The antennules are moderately short and oinpo^id 

 of eight joints ; the tirst four ai'e somewhat dilated, while 

 the four end joints are rather slender; the fourth and fifth 

 joints, which are subequal in length, are shortsr than the 

 otliers (tig. 15). 



The antenna? are furnished with short and apparently oti3- 

 jointed secondary branches. 



The various mouth-organs resemble somewhat those of 

 Attheyella pygmcea (G. O. Sars). 



In the first pair of thoracic feet the inner branches, which 

 are about equal in length to the outer, consist of two joints ; 

 the end joint is rather narrower and shorter than the proximal 

 one, and is furnished with a moderately long and slender 

 terminal spine and two setaj, one being very long and slender 

 and one (the innermost) very short ; a short spinifbrm S3ta 

 also springs from near the end of the inner margin of the 

 proximal joint (fig. 16) ; both joints have a fringe of rainut3 

 hairs on the outer margin. The outer branches are mode- 

 rately stout and composed of three subequal joints ; their 

 armature is somewhat similar to that of the outer branches of 

 the first pair in Attheyella pygmcea. 



The second and third pairs are somewhat similar to each 

 other in structure ; the outer branches consist of three and 

 the inner of two joints ; the first joint of the inner branches 

 is very short and moderately stout ; the second joint is 

 narrower and tapers towards the distal extremity, which 

 reaches to near the end of the second joint of the outer 

 branches; this end joint bears two coarsely-feathered terminal 

 seta?, one being short and spine-like and one very long and 

 slender. In the second pair the second joint of the inner 

 branches appears also to carry one small hair on the lower 

 half of the inner margin (tig. 17), while the same joint of 

 the inner branches of the third pair carries two setse similarly 

 situated; in this pair the terminal spine is also stouter than 

 the terminal spine of the second pair (fig. 18). Tiie structure 

 of the outer branches is somewhat lilce that of the outer 

 branches of the first pair, but a small seta springs from near 

 the middle of the inner margin of the third joint ; moreover, 

 the terminal spine of the end joint is very long, and a very 

 lung and slender seta also springs from the inner distil an^-le 

 of the same joint. In the iburtli pair the inner branches, 

 which are very short and scarcely reach to the end of the 

 first joint of the outer branches, have the proximal joint ex- 

 tremely small, while the end joint, which is the longer of the 



