105 



broadly rounded at the end, which carries 4 ciliated setse, the innermost of 

 which is the shortest. Ovisacs of moderate size and slightly divergent. 



Body of a clear whitish colour and partly ornamented with a fine rosy 

 pigment. 1 ) 



Length of adult female scarcely exceeding 0.65 mm. 



Remarks. It is possible that the form observed by Boeck more pro- 

 perly may be referable to the present species. In this cas should consequently 

 in strict law the form described in Vol. VI as C. longicornis Boeck have a 

 new name. I think however it may be allowed to retain both these names in 

 the sense here proposed. The 2 species are certainly very nearly allied, but 

 may at once be distinguished by the different length of the caudal rami. I 

 have failed to detect any transition in this respect. 



Occurrence. The species occurs along our whole southern and western 

 coast, from the Christiania Fjord at least to Molde. It is always found close 

 to the shores among algse and sometimes, as stated by Brady, even in pools 

 left by the tide, never, as is the cas with C. longicornis, at any consider- 

 able depth. 



Distribution. British Isles (Brady), Mediterranean (Giesbrecht). 



83. Cyclopina dilatata, n. sp. 



(PI. LXX, fig. 1). 



Specific Characters. Female. Body rather short and stout, with the 

 anterior division unusually dilated and, viewed dorsally, of rounded oval form. 

 Cephalic segment very large, about twice as long as the remaining part of 

 the trunk, and quite evenly rounded in front. Tail comparatively narrow, and 

 occupying nearly half the length of the body; genital segment about equalling 

 in length the 2 succeeding segments combined and sligtly widening in front. 

 Caudal rami resembling in shape and relative length those in C. littoralis; 

 seta of outer edge, however, attached somewhat in front of the middle. 

 Anterior antennae comparatively shorter and less attenuated than in the said 

 species, but composed of 19 well defined joints clothed with comparatively 

 short setae. Posterior antennae, oral parts, and natatory legs apparently of a 

 structure similar to that in C. littoralis. Last pair of legs however, though 

 built on the same type, of a somewhat different appearance, the terminal joint 



J ) The colour as signed (in Vol. VI) to C. longicornis, applies in reality only to the 

 present species. C. longicornis is of a much paler hue. 



