40 



setae of very unequal length, the innermost but one being much the longest 

 and nearly attaining the length of the tail, the innermost seta considerably 

 smaller than the outermost; bristle of outer edge attached a little beyond the 

 middle, dorsal bristle near the end of the ramus. Eye well developed. An- 

 terior antennae of moderate size, not however attaining the length of the 

 cephalic segment, and composed of 13 well-defined joints rather densely clothed 

 with setae; hinge, as in Notodelphys, occurring between the penultimate and 

 antepenultimate joints. Posterior antennae almost of exactly same structure as 

 in Notodelphys. Natatory legs well developed, with both rami 3-articulate and 

 of about equal size, the outer one armed outside and at the tip with slender 

 cultriform spines. Last pair of legs very small and rudimentary, with the 

 proximal joint quite short and produced outside to the usual digitiform process; 

 distal joint rounded, scale-like, with a thin bristle at the tip and a very minute 

 spine inside. 



Colour of the living animal not yet ascertained. 



Length of the specimen examined 1.15 mm. 



Remarks. Though the figure of the animal (dorsal view) in Canu's work 

 does not fully agrees with that here given, I cannot doubt that these 2 forms 

 are identical, as no obvious difference could be detected in the structure of 

 the several appendages. 



Occurrence. A solitary male specimen of this form was found in some 

 dredged material taken af Grimstad, south coast of Norway, from a depth of 

 about 20 fathoms. 



Distribution. Coast of France (Canu). 



Fam. 2. Doropygidae. 



General Characters. Body of female more or less compressed and curved 

 ventrally, with the anterior and posterior divisions sharply marked off from 

 each other; that of male more slender, with less sharply marked limit between 

 the 2 chief divisions. Head well defined from trunk, and produced in front 

 to a blunt rostral prominence, lateral parts deflexed and rounded off. 1st 

 segment of trunk distinctly defined both in front and behind, but of much 

 smaller size than the succeeding ones. The last 2 trunkal segments in female 

 united, to form dorsally the large and prominent incubatory pouch. Tail 



