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somewhat produced and narrowly rounded at the tip. Urosorae exceeding in 

 length x /3 of the anterior division, genital segment scarcely protuberant below. 

 Caudal rami scarcely twice as long as they are broad, and not at all divergent, 

 outermost seta present only as a minute hair, outermost but one only slightly longer 

 than the caudal rami, the other 3 very much elongated. Left anterior antenna 

 about the length of the anterior division of the body, and composed of 20 articu- 

 lations, 7th to 10th very small; right antenna much shorter, scarcely reaching, 

 when reflexed, beyond the 1st pedigerous segment, and composed of 19 arti- 

 culations only, bristles on both antennae partly ciliated. Posterior antennae with 

 the distal joint of the inner ramus shorter than the proximal one. Last pair of 

 legs with the 2nd joint provided at the end inside with a long seta, terminal 

 joint about the length of the other 2 combined, and armed outside with 2 short 

 spines. 



Mule resembling the female in shape, but of considerably smaller size, 

 and, as usual, having the urosome narrower and 5-articulate. Anterior antennas 

 exhibiting a similar inequality in length to that in the female, both provided on 

 the proximal part with long band-like sensory appendages curved backwards, left 

 one with an imperfect hinge near the tip, middle section scarcely at all tume- 

 fied. Right last leg a little longer than left, but otherwise of a very similar 

 structure. 



Colour. Body rather pellucid, with a light yellowish grey tinge. 



Length of adult female 1.10 mm., of male 0.86 mm. 



Remarks. As mentioned above, this is as yet the only known species of 

 the present genus. It is easily recognizable from all our other Calanoids by the 

 very conspicuous inequality of the anterior antennae. Its appearance is otherwise 

 quite calanoid. 



Occurrence. Some few specimens of this peculiar Calanoid, all of the 

 female sex, were found many years ago by the present author in the upper part 

 of the Christiania Fjord, not far from the town, the depth being about 30 fathoms. 

 A solitary male specimen, the one figured here, was further captured last summer 

 in another locality of the Norwegian coast, viz., in the Storfjord, inland from 

 Aalesund, at a depth of about 60 fathoms. It is a true bottom-form, always 

 keeping close to the ground, and accordingly can only be procured by the aid 

 of the dredge. This circumstance, in addition to its small size and insignificant 

 colouring, may be the cause of its having escaped the attention of other authors, 

 even that of the sharp-sighted Scottish naturalist, Th. Scott. 



