103 



regularly oval in form, with the cephalic segment less contracted in front. Tail 

 comparatively slender, with the genital segment about as long as the 3 suc- 

 ceeding segments combined and very slightly dilated in its anterior part. 

 Caudal rami much shorter than in C. gracilis, only slightly exceeding in length 

 the anal segment, and scarcely more than 3 times as long as they are broad; 

 seta of outer edge attached near the middle; innermost apical seta about twice 

 as long as the outermost. Antennae, oral parts, and natatory legs of a structure 

 very similar to that in C. gracilis. Last pair of legs likewise built on the 

 same type as in that species, though, on a closer comparison, exhibiting slight 

 differences in their form, the distal joint being more elongate and more strongly 

 constricted at the base, with the outer apical spine fully twice as long as the 

 inner. Ovisacs of moderate size and closely appressed to the sides of the tail. 



Colour uniformly whitish grey. 



Length of adult female scarcely exceeding 0.50 mm. 



Remarks. The above described form is unquestionably that briefly 

 announced by Boeck under the name of C. norvegica and also observed by 

 several other authors, but regarded by them as identical with C. gracilis Claus. 

 The latter species, originally described from the Mediterranean, has also been 

 found by the present author on the Norwegian coast, and is figured in 

 Vol. VI, PI. IV. 



Occurrence. This is a pronouncedly littoral form, being only found 

 close to the shores and frequently occurring in shallow pools left by the tide. 

 I have met with it in many places, both of our southern and westeren coasts. 



Distribution. British Isles, bay of Kiel, coast of France, Polar Sea. 



81. Cyclopina brachystylis, n. sp. 



(PI. LXX, Fig. 2). 



Specific Characters. Female. Body comparatively short and stout, 

 with the anterior division broadly oval in form, greatest width occurring some- 

 what behind the middle. Tail comparatively less slender than in the preceding 

 species, with the genital segment scarcely longer than the 2 succeeding ones 

 combined. Caudal rami very short, not even attaining the length of the anal 

 segment and only sligthly longer than they are broad; seta of outer edge 

 attached about in the middle; apical setae of moderate length, the innermost 

 one a little longer than the outermost. Anterior antennae comparatively short 

 and, as in the preceding species, only composed of 10 joints, the 6th of which 

 is much the longest, though scarcely attaining the length of the 4 succeeding 



