118 G. 0. SARS. CRUSTACEA. [norw. POL. EXP. 



projections. The dactylus is very slender, fully as long as the palm, and 

 but slightly curved, vi'ith the inner edge finely denticulate. 



The natatory legs (figs. 9—12) are built upon the very same type as in 

 OnccBa, though exhibiting some minor differences, both as to the basal part 

 and the rami. The 1st basal joint in all pairs except the 4th, has a plumose 

 seta inside, that is v^^anting in Onccea; and the inner corner of the 2nd joint 

 is broadly rounded and perfectly smooth, the terminal edge projecting, in all 

 the pairs, between the insertions of the rami, in a well-marked triangular 

 prominence. The rami agree closely in structure with those in Onccea, and 

 carry the very same number of spines and natatory setae. The spines, how- 

 ever, are much more slender, and the hyaline rim appears quite smooth. 

 The apical spine of the outer ramus almost equals in length the whole 

 ramus. 



The last pair of legs (see figs. 13 & 14) form each a small cylindrical 

 piece attached to the sides of the last segment of the trunk, and more properly 

 representing the distal joint, the proximal joint being wholly consolidated with 

 the segment. At the end of this piece are 2 unequal spines, both of exactly 

 the same structure as the spines of the natatory legs. The inner and larger 

 spine extends only a little beyond the middle of the genital segment, whereas 

 in L. aculeata, it reaches nearly to the posterior edge, and in L. squillima/na 

 even projects beyond the limits of this segment. 



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

 female sex, were found in a sample taken May 22nd, 1894, between the 81st 

 and 82nd degrees of latitude, the tow-net having been lowered to a depth of 

 100 metres. 



Tribe: AMPHARTHRANDRIA. 



Remarks. This tribe is here taken in a more restricted sense than is 

 done by Dr. Giesbrecht, who comprises in it all Copepoda in which both 

 antennae of the 1st pair in the male are prehensile. In my opinion, the 2 

 families Monstrillidce and Harpacticidce are so very distinct, that they 

 ought both to be regarded as great divisions equivalent to the division 

 Calanoida, only the Cyclopoid forms with the above character being kept 

 in the tribe, 



