21 



attention. It is however of somewhat inferior size and moreover, on a closer 

 examination, exhibits some well-marked sexual differences, especially as regards 

 the structure of the anterior antennae and the last pair of legs. The imperfect 

 prehensile nature of the former appendages is very remarkable. 



Occurrence. The present peculior Copepod was formerly only known 

 from the Lofoten islands. I have in the latter years taken it rather abun- 

 dantly at Ris0r, South coast of Norway, in depths ranging from 60 to 100 

 fathoms, muddy bottom. Among the numerous specimens collected only very 

 few males were detected. 



Gen. Zosime, Boeck. 



Remarks. Two well defined species of this genus, Z. typica Boeck 

 and Z. incrassata G. O. Sars, have been described in Vol. V. In the present 

 Volume 2 other species are added, both of which are closely allied to the 

 typital one, though apparently distinct. 



12. Zosime major, G. O. Sars, n. sp. 



(PI. XIII, fig. 2). 



Specific Characters. Female. Very like Z. typica in its outward 

 appearance, but of considerably larger size and comparatively more slender 

 form of body. Anterior segments of urosome, as in that species, expanded 

 laterally to triangular recurved lamellae finely spinulose at the edges; penultimate 

 segment simple, cylindrical in form, and armed along the hind edge dorsally 

 with a dense and regular row of rather coarse denticles. Caudal rami rather 

 produced, being fully 3 times as long as they are broad, and somewhat con- 

 stricted at the base; anterior half of the outer edge finely spinulose, seta of 

 same edge of moderate size and attached near the end of the ramus; apical 

 setae only 3 in number on each ramus, that usually attached to the outer 

 corner being wholly absent; innermost seta comparatively small, the other 2 

 rather strong and clothed in their outer part with small prickles instead of the 

 usual cilia. Antennae, oral parts, and natatory legs of a structure very similar 

 to that in the type species. Last pair of legs, however, differing in the much 

 larger size of the inner expansion of the proximal joint, which is broadly 

 rounded at the end and provided with 4 strong marginal setae; distal joint 

 comparatively small, but well defined at the base. 



Colour whitish grey. 



