13 



without lateral keels ; antero-lateral corners in female acutely produced, in male 

 obtuse; pseudo-rostral projection rather prominent. 1st pedigerous segment di- 

 stinctly exposed dorsally. Eye distinct in both sexes, but much more fully de- 

 veloped in mah 1 . Superior antenna 1 of exactly same structure in the 2 sexes, peduncle 

 rather slender, flagella extremely small, the outer one tipped with a single large, 

 annulated sensory filament. Inferior antennae in female with 4 plumose seta; on 

 the proximal joint; those in male about as in Cuma. Posterior lip with the la- 

 teral lobes coarsely dentate at the anterior corners. 3rd pair of maxillipeds, as 

 in C'innn. having the basal joint produced at the end outside to a rather prominent 

 linguiform lobe; moral joint likewise forming outside a broad lamellar expansion, 

 fringed with, strong plumose setse. 1st pair of legs rather slender and nearly 

 naked; the remaining pairs comparatively short, and more densely setiferous 

 than in Cuma; 2nd pair with the basal and ischial joints coalesced. Uropoda 

 rather strongly built, with the basal part spinulose inside, inner ramus distinctly 

 biarticulate, proximal joint short and thick, distal one slender linear, both densely 

 spinulose inside. 



Remarks. This genus was established by Sp. Bate, to include the CUHHI. 

 trisi>iuo*f( of Goodsir. The generic name first proposed, Halia, being already appro- 

 priated, it was subsequently changed by the same author to Iphinoe (sometimes 

 erroneously spelt Iphithoe). Two other generic names proposed by that author, 

 viz., Venilia and Cyrianassa, ought to be wholly withdrawn, being only 'founded 

 on the adult male of this species. The genus, though evidently belonging to 

 the same family as Cuma, is quite distinct from the latter by the very slender 

 form of the body, the thin integuments, and the clearly exposed 1st pedigerous 

 segment. Moreover the structure of the antennae is rather peculiar, and some 

 of the other appendages also exhibit well marked differences. Of this genus, 

 the present author has described 3 species from the Mediterranean, and Dr. 

 Hansen has recently added 3 other species from the German Plankton-Expedition, 

 making, together with the type species, 7 in all. To the fauna of Norway be- 

 longs only the type species, to be described below. 



