REPORT ON THE SCHIZOPODA. 211 



Genus 8. Euchcetomera, G. 0. Sars, 1883. 



Huchcetomera, G. O. Sars, Preliminary Notices on the Challenger Schizopoda. 



Generic CJiaractei's. — Carapace not fully covering trunk, emarginate posteriorly ; 

 frontal margin slightly projecting in the middle. Eyes somewhat irregular in form, 

 cornea contracted in the middle. Antennular peduncle of moderate size ; male 

 appendage normally developed. Antennal scale with outer edge naked and terminating 

 in a dentiform projection, apex obliquely truncate, with inner corner projecting. Legs 

 very slender, increasing in length posteriorly, and provided with unusually strong 

 plumose setae, propodal joint subdivided into three distinctly defined and mobile 

 articulations, terminal joint unguifovm, esopods with terminal part very elongate and 

 flexible. Caudal limbs in female simple but rather large, laterally extended and fringed 

 with remarkably strong setae ; those of male all natatory. Telson remarkably short, 

 lamelliform, rounded, apex entire and provided with two long ciliated setae. Uropoda 

 with elongate and narrow plates, fringed all round with long setae, inner plate much 

 shorter than outer, and with auditory apparatus well developed. 



Memarls. — The present new genus is cliicHy characterised by the unusually short, 

 lamelliform telson, agreeing somewhat in form with that of the genus Enjthrops, 

 G. 0. Sars ; also by the slender legs and the very strong development of the setae on the 

 several limbs. The species of this genus would seem to lead a pelagic existence as is the 

 case with those of the preceding genus, met with, as they are, at the surface of the sea 

 far from the coasts. Two species are represented in the collection, easily distinguished 

 by the armature of the telson, as follows : — 



f with lateral edges denticulate, . . . . . . E. tijpica, G. O. Sars. 



Telson 



( without lateral denticles, . . . . . . . E. tenuis, G. O. Sars. 



55. Euchcetomera typica, G. 0. Sars (PI. XXXVII. figs. 1-20). 



Euchcetomera tijpico, G. O. Sars, Preliminary Notices on the Challenger Schizopoda, No. 52. 



Specific Characters. — Form of body rather robust. Carapace broadly emarginate 

 posteriorly, exposing almost wholly the two last segments of the trunk ; frontal projection 

 acutely pointed. Last caudal segment comparatively short. Eyes of moderate size, 

 pyriform, projecting on either side, and separated at the base by a distinct interval. 

 Antennal scale oblong, somewhat curved, about four times as long as broad, spine of outer 

 corner remarkably strong. Telson fully as broad as long, with five strong lateral denticles 

 on either side. Length, 14 mm. 



Remarks. — The examination of this and the following form, as regards external 

 appearance, has been somewhat diflicult, from the specimens being mounted on glass 



