11 



caudal rami, the other by the strong development of the spines on the legs. 

 The specimens of these 2 forms, which I had noted with the provisory names, 

 C. longifurca and C. euacantha, have, however, unfortunately been lost, and I am 

 thus unable to give any closer description of them here. A small species of this 

 genus has also been described by me from the Chatham Islands under the name 

 of C. pusilla, and another species has recently been recorded by Th. Scott as 

 C. longicaudata. 



3. Cyclopina graeilis, Claus. 



(PI. IV). 

 Cyclopina gracilis, Claus, Die freilebenden Copepoden, p. 104, PI. X, figs. 9 15. 



Syn: Cyclopina norvegica, Boeck. 

 Cyclops salinm, Brady. 



Specific Characters. Female. Body moderately slender, with the anterior 

 division oval in form, greatest width exceeding half the length and occurring about 

 in the middle. Tail rather slender, with the genital segment about the length of 

 the other 3 combined and gradually narrowed behind. Caudal rami of somewhat 

 varying length, though scarcely longer than the last 2 segments combined, sub- 

 linear in form and only slightly diverging, seta of outer edge placed in front of 

 the middle ; apical setae of moderate length, the inner medial one being, as usual, 

 the longest and about equal to the tail in length ; seta of inner corner scarcely 

 longer than that of the outer. Anterior antennas not much elongated, being 

 considerably shorter than the cephalic segment, and composed of 10 joints, the 

 6th of which is much the longest and about equal in length to the 4 succeeding 

 ones combined. Posterior antennae with the last joint scarcely as long as the 

 2nd. Natatory legs with the spines outside the outer ramus of moderate size, 

 3 such spines being present on the terminal joint, except in 4th pair, where only 

 2 spines occur outside the apical spine. Last pair of legs biarticulate, proximal 

 joint comparatively broad and finely ciliated inside, carrying outside the usual 

 slender bristle, distal joint shorter and narrower than the proximal one, sub- 

 quadrangular in form, and armed on the obtusely truncated extremity with 2 

 somewhat unequal lanceolate spines, between which a slender bristle is attached. 

 Ovisacs of moderate size, oval in form, and carried closely appressed to the sides 

 of the tail. 



Male of much smaller size than female, and easily distinguished by the 

 strongly hinged anterior antennae and the distinctly 5-articulate tail, the 1st 

 (genital) segment of which is considerably dilated. Last pair of legs of exactly 

 the same appearance as in the female. 



