10 



erted at the lower corner. Copulative appendages with the 2 terminal lappets 

 of a somewhat different shape from those in the male of C. norveqica, the 

 outer lappet being scarcely hamiform. 



Body semipellucid, of a similar whitish grey colour to that in the 

 preceding species; ova in the incubatory cavity of a pale orange hue. 



Length of adult female amounting to 3.29 mm., of male to 3.35 mm. 



Remarks.- The above-described form is nearly allied to C. norvegica, but 

 may be easily distinguished by the somewhat different shape of the shell, as 

 seen laterally, and more particularly by the large size of the eyes in both 

 sexes, the latter character having given rice to the specific name proposed. 

 Moreover some "slight differences may be stated to occur also in the other 

 structural details, as pointed out in the above diagnosis. 



Occurrence. Only a limited number of specimens of this form have as 

 yet come under my notice. They were taken in moderate depths, partly in 

 the innermost part of the Hardanger Fjord at Utne, partly off the west coast 

 at Christiansund. Out of Norway this form has not yet been recorded. 



Gen. 2. Philomedes Lilljeborg, 1853. 



Syn : Cypridina Lilljeborg (not M. Edward). 

 Bradycinetus G. O. Sars. 



Generic Characters. Sexual dimorphism very strongly marked. Shell 

 much more elongate in male than in female, with the frontal sinus of quite 

 a different shape; rostral prominences in female large and procumbent, in 

 male almost horizontally porrected and obtuse at the end. Eyes in female 

 much reduced, in male largely developed. Frontal tentacle in both sexes 

 slender, styliform. Anterior antennae only composed of 6 joints and rather 

 dissimilar in the 2 sexes, those in male being considerably more elongate and 

 provided at the end of the 4th joint with a strongly developed sensory seta 

 (wanting in female); 2 of the apical setae moreover enormously prolonged and 

 very mobile, being more generally abruptly reflexed. Posterior antennae much 

 more powerfully developed in male than in female, with the 3rd joint of the 

 outer ramus remarkably prolonged and the outer joints provided with well 

 developed natatory setae, whereas these setae in the adult female are, as a rule, 

 found to be brocken off at some distance from the base; inner ramus in 

 female small, biarticulate, in male much larger and distinctly prehensile. An- 



