100 



% 



much produced; hand in female scarcely at all dilated, with the dactylus very 

 small, in male somewhat more strongly developed. Natatory legs slender, 

 with the inner ramus in all of them 3-articulate and longer than the outer, 

 the later in 1st pair uniarticulate, in the succeeding pairs 3-articulate. Last 

 pair of legs forming each a narrow biarticulate stem extended somewhat laterally. 

 Remarks. The present genus was established by Dana in the year 

 1852, to include a peculiar Copepod found in the Pacific. Neither Glaus nor 

 Brady recognised Dana's genus, and the generic names proposed by these 

 authors, Goniopelte and Goniopsyllus, are indeed only synonyms of that genus. 

 The species of the present genus are readily recognised by the peculiar flat- 

 tened and laciniate shape of the anterior part of the body, caused by the 

 lamellar expansions of the segments, as also by the very short caudal setae. 

 Of the structural details may be noted the poor development of the oral parts, 

 and the rather anomalous structure of the legs, especially that of the 1st and 

 last pairs. The genus comprises as yet only 2 nearly-allied species, both truly 

 pelagic in habits. One of these species has proved to be referable to the 

 Fauna of Norway, and will be described below. 



79. Clytemnestra scutellata, Dana. 



(PI. LXIX). 



Clytemnestra scutellata, Dana, Crustacea of the U. S. Explor. Expedition, p, 1194, PI. 83. 



Syn: Goniopelte gracilis, Glaus. 



Specific Characters. Female. Body moderately slender and rapidly 

 tapered behind, with the anterior division conspicuously expanded and some- 

 what flattened. Cephalic segment very large and broad, fully occupying half 

 the length of the anterior division, with the postero-lateral corners triangularly 

 produced; rostral projection rather prominent and obtusely pointed at the end. 

 The 3 succeeding segments successively somewhat diminishing in size, each 

 produced laterally to a prominent triangular lappet pointing obliquely back- 

 wards. Last trunkal segment very small, without any lateral expansions. Uro- 

 some scarcely attaining half the length of the anterior division and of narrow 

 cylindrical form, though a little tapering in its outermost part; genital segment 

 comparatively large and not subdivided in the middle; last segment about the 

 size of the preceding one and transversely truncated at the end, with the anal 

 opercle very small. Caudal rami fully twice as long as they are broad and 

 somewhat incurved, with the outer distal corner conically produced; outer edge 

 with 2 successive slender spines near the base and a short seta close to the 



