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 male. Superior antennae 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 setae 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 Cuma, having the basal joint produced at the end outside to a rather prominent 
linguiform lobe; meral joint likewise forming outside a broad lamellar expansion, 
fringed with strong plumose setae. 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 Cuma 
tnspinosa of Goodsir. The generic name first proposed, Halia, being already appro¬ 
priated, it was subsequently changed by the same author to Iphiuoe (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viz., Venilia and Cyrianassa, ought to be wholly withdrawn, being only founded 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. 
