24 



differing, 1st joint of inner ramus in the 2nd and 3rd pairs exhibiting an appear- 

 ance similar to that in Cervinia, the inner corner being greatly produced, and 

 the natatory seta transformed in to a strong spine. Last pair of legs with the 

 distal joint comparatively less slender than in C. clavicomis, middle apical seta 

 quite short. 



Colour whitish gray. 



Length of adult female 1.30 mm. 



Remarks. Though very closely allied to the preceding species, this form 

 is unquestionably specifically distinct, differing not only in the greater length of 

 the caudal rami, but also in the smaller size of the lateral projections of the 

 genital segment, and partly also in the structure of the legs. 



Occurrence.- Only 2 female specimens of this form have hitherto come 

 under my notice. They were taken from great depths off the west coast of Nor- 

 way, the exact locality not being stated. 



Gen. 7. EUCanuella, Scott, 1901. 



Generic Characters. General form of body about as in Cerviniopsis. 

 Cephalosome imperfectly defined from the 1st segment of metasome, and projecting 

 in front to a conically-pointed rostrum. Epimeral plates of the 3 succeeding 

 segments well developed, acutely pointed behind. Genital segment in female with 

 a well-marked transversal suture in the middle dorsally, and produced on each 

 side to a strong spiniform projection. Caudal rami somewhat lamellar, non con- 

 tiguous, tapering distally. Anterior antenna distinctly 7-articulate, and edged with 

 ciliated setae, one of them, issuing from the 4th joint, being much larger than the 

 others, the 3 outer joints abruptly much narrower than the preceding ones. 

 Posterior antennae comparatively feebler in structure than in the 2 preceding 

 genera, outer ramus well developed, 4-articulate. Oral parts on the whole re- 

 sembling those in Cervinia and Cerviniopsis. Natatory legs comparatively slender, 

 with both rami 3-articulate, outer ramus of 1st pair unusually strong and much 

 longer than the inner. Last pair of legs about as in Cerviniopsis. Male unknown. 



Remarks. This genus, established by Th. Scott, ought undoubtedly to be 

 referred to the family Cerviniidce, as here defined. In several respects it exhibits, 

 indeed, a close resemblance to the genus Cerviniopsis, but differs in some other 

 points so materially, that it ought more properly to be kept apart. The chief 



