15 



figures has been given by the present author in his account of the Mediterranean 

 Cumacea, but it was at that time regarded as only a variety of the type species. 

 Now, however, I ain inclined to regard this form as specifically distinct from Good- 

 sir's species, as it slightly differs, not only in the armature of the carapace, but 

 also in some other structural details. 



Occurron-r. Of this form, a single adult male was found by the present 

 author in the year 1875 at Flekkcro, near Christiansand. This specimen, which 

 is figured in PI. V. is the only proof of the occurrence of the present form on" 

 the Norwegian coast. The figures of the female here given are from British speci- 

 mens kindly sent to me by the late David Robertson. 



Distribution. British Isles (Goodsir), coast of France (Bonnier), Kattegat 

 (Meinert). 



Gen. 3. CyClaSplS, G. 0. Sars, 1864. 



Generic Characters. Body slender and elongated, with the anterior divi- 

 sion rather tumid in front, but abruptly tapered behind. Integuments hard, cal- 

 careous. Carapace very large and deep, being strongly vaulted dorsally, pseu- 

 do-rostral projection small or obsolete. 1st pedigerous segment wholly concealed 

 both dorsally and laterally. Tail exceeding in length the anterior division, last 

 segment rather elongated and obtusely produced behind. Eye present or want- 

 ing. Superior antennae with the flagella very small, the outer one Inarticulate 

 and tipped with 2 very slender sensory filaments, the inner rudimentary, knob-like 

 Inferior antennte in female with only 2 plumose setse of the proximal joint; those 

 in male shorter than the body. Posterior lip with the lateral lobes incurved at 

 the tip, and armed with lamellar teeth. 3rd pair of maxillipeds with the basal 

 joint very large, and produced at the end outside to a broad setiferous lobe. 

 1st pair of legs slender, but having the proximal part of the basal joint laniel- 

 larly expanded. The remaining pairs very small and but sparingly setous; 2nd 

 pair with the full number of joints. Uropoda comparatively short, with both rami 

 lanceolate, the outer biarticulate, the inner uniarticulate. 



Remarks. This genus was established by the present author in the year 

 1864, to include a peculiar deep-water Cumacean found off the Norwegian coast. 

 3 other species, undoubtedly belonging to the same genus, were added by him 



