160 



face of large colonies of Morchallium argus M. Edw. and Fragarium areola- 

 tum Giard. 



Distribution. Coast of France (Canu). 



85. Lichomolgus tenuifurcatus, G. O. Sars, n. sp. 



(PI. LXXXIX). 



Specific Characters. Female. Body a little more slender than in the 

 last-described species, with the anterior division broadly oval in outline and 

 pronouncedly depressed. Cephalic segments rather broad behind, but gradually 

 narrowed in front, and exhibiting dorsally a well-marked transverse suture, as 

 a boundary between the cephalon and the 1st trunk-segment, this boundary 

 being also indicated by a slight instriction of the lateral edges. Tail rather 

 slender, considerably exceeding half the length of the anterior division; genital 

 segment fully as long as the 3 remaining segments combined, and rather tumid 

 in its anterior part; anal segment about the length of the 2 preceding seg- 

 ments combined. Caudal rami considerably produced, being more than twice 

 as long as the anal segment and slightly divergent, their distal part conspicu- 

 ously narrowed; seta of outer edge atttached somewhat beyond the middle; 

 apical setae normally developed, the inner mediate one more than twice as 

 long as the outer, and having its distal part somewhat bent outwards; seta 

 of inner corner only slightly longer than that of the outer. Integuments rather 

 l:iin "nd soft. Anterior antennae scarcely as long as the cephalon, and built 

 in t jsual manner, last joint very small. Posterior antennae resembling in 

 structure those in L. Poucheti, having a claw-like spine at the end of the 

 penultimate joint, and 4 apical claws, the innermost long and narrow. Oral 

 parts and legs likewise rather similar. Ovisacs very large, oblong in form, 

 and extending far beyond the end of the tail. 



Body of a dark grey colour, with a slight yellow tinge, and the ovarial 

 tubes more opaque. 



Length of adult female 1.40 mm. 



Male unknown. 



Remarks. The present new species is nearly related to L. Poucheti, 

 as regards its structural details, but is of considerably larger size, and moreover 

 at once distinguished by the much more produced and narrower caudal rami, 

 a character which indeed has given rise to the specific name hefe proposed. 



Occurrence. Some few female specimens of this form were taken many 

 years ago on the west coast of Norway, at Eggesbenaes, and last summer I 



