100 



paratively short. Anterior antennae very slender, almost attaining the length of 

 the cephalic segment, and composed of 20 joints, terminal part comparatively 

 small and, as in the preceding species, Inarticulate. Posterior antennae about as 

 in that species. Oral cone very short and abruptly contracted at the extremity. 

 Mandibles with the masticatory part less strong than in the type species, and 

 scarcely denticulated at the tip. Maxillae with both lobes comparatively shorter. 

 Anterior maxillipeds with the claw imperfectly biarticulate. Posterior maxillipeds 

 rather slender, with a thin bristle in the middle of the palmar edge. Natatory 

 legs with the spines of the outer ramus rather broad, lancet shaped and distinctly 

 denticulated at the edges; terminal joint of this ramus in 1st pair with only 2 

 setae inside, that of 2nd pair with 4 such setae. Last pair of legs with the distal 

 joint rather short and projecting into 2 unequal dentiform processes, between 

 which 2 likewise unequal bristles are attached. 



Colour rather peculiar: anterior division of body of a clear whitish hue, 

 with a number of narrow transverse bands of a bright red colour, 3 of them 

 occupying the hindmost part of the 3 anterior segments, 2 others, of a more 

 irregular form, crossing the cephalic segment in front of the middle. Tail and 

 anterior antennae of a beautiful rosy hue. 



Length of adult female about 1 mm. 



Male unknown. 



. Remarks. This form is at once distinguishable from both of the 2 hitherto 

 recorded species, though evidently belonging to the same genus. The specific 

 name is derived from the very peculiar and beautiful colour of the body, when alive. 



Occurrence. Only a solitary female specimen of this handsame form has 

 come under my notice. It was taken, many years ago, at Kallevaag, west coast 

 of Norway, from a depth of about 50 fathoms, among dredged material. 



Gen. 21. COllOChereS, Canu, 1893. 



Syn: Cydopicera, Brady (part). 

 Clausomyzon, Giesbrecht. 



Generic Characters. Body of very slender form, with the anterior division 

 only slightly dilated and somewhat compressed in front; rostrum comparatively 

 small, but acutely produced. Epimeral parts of the trunk-segments rounded off. 

 Tail composed in female of 4, in male of 5 segments. Caudal rami long and 



