394 



Stenheliopsis media, U. 0. Sars, n. sp. 



(Suppl. PI. 26, fig. 2). 



<' Ch<ir<irtm. Ffwul' Body comparatively less robust than in the 

 pi-reeding species, more resembling that in the type one. Rostral plate of a 

 -imilar shape to that in S. /'/////'"" though perhaps a little less broad. Urosome 

 ^horter than the anterior division and slightly tapered behind, last segment com- 

 paratively small and deeply cleft at the end. Caudal rami much narrower than 

 in tin- preceding species, though not nearly so extremely slender as in the type, 

 and considerably divergent, apical setse, as in the 2 other species abruptly curved 

 outwards. Anterior antenna? resembling those in S. lafifurcn, though only com- 

 posed of JS distinctly defined joints, the penultimate one being wholly coalesced 

 with the preceding joint, so that the terminal part only consists of a single joint. 

 Posterior antennse and oral parts nearly as in S. latifttrm. 1st pair of legs 

 likewise of a very similar structure, though having the 1st joint of the inner ramus 

 -till broader in proportion to its length and provided inside with a well developed 

 seta Natatory legs, as in the preceding species with both rami distinctly 3-arti- 

 culate. but of far less robust form, last joint of both rami much narrower and 

 exhibiting a quite normal armature. Last pair of legs resembling those in N. 

 /////"/</. 'aril funning a simple quadrangular lamella edged with 6 setse. Ovisacs 

 MM small, each only containing a single ovum. 



Colour pale yellow. 



Length of adult female 0.46 mm. 



/,' murk*. As to the external appearance, the present form more 

 Hildas the type species than does the preceding form It is however 

 undoubtedly more nearly allied to the latter than to the former, as proved by 

 tin- >tructure of the several appendages. In the shape of the caudal rami it 

 occupies, as it were, an intermediate position between both, a feature which has 

 L r i\i'ii ri>c to the specific name here proposed. 



Occurrence. Some -necimens of this small Copepod. all of the female 

 BOX, were taken in the harbour of Farsund, from a depth of about 20 fathoms. 

 muddy bottom. 



Page 209. 

 Mi^ni-hrn /i//<ini,t (Clans). 



I'olar Islands north of GriiiiK'll Land (2nd Frara Exp.). 



