100 



by most recent carcinologists to that given hy Chins. The genus, though evidently 

 belonging to the same family as To nor a, differs very markedly from that genus 

 in several characters, among which may be named the very different structure of 

 the last pair of legs in both sexes. We know at present 7 or 8 species referable 

 to this genus, some of which have been found in brackish water, some in perfectly 

 fresh water, and some both in the sea and in inland lakes. To the fauna of 

 Norway belong 3 species, to be described below. 



42. Eurytemora velox (Lilljeborg). 



(PI. LXVII & LXVIII). 



Tciiiord ci'lo.r, Lilljebortv, Crust. <le onlinibus tribus in Scania occurrentibus. 



p. 177, PI. 20, n>s. 29 (9). 



Syn: ('t/<-!uiixiii<i Idchnd/ifd, Fiscber (not Miiller). 



Tl'IIIOftt Cldtlfii, Hock. 



Temorella Clausii, Glaus. 

 Eurytemora Iddn'ilata. Ricb. 



E'liri/tenioni ('Ifiiixii. Jiraily. 



TcniOi'cJId Idriinildfd, Cl. O. Sars. 



HjH'dfic i'liorarto'*. Foiii/Jr. Body moderately slender, with the anterior 

 division, seen clorsally, oblong oval in form, greatest width not attaining half the 

 length, and occurring about in the middle, anterior extremity broadly rounded, 

 posterior scarcely at all contracted ; seen laterally only slightly vaulted above. 

 Cephalosome scarcely longer than the 3 succeeding segments combined, and 

 exhibiting at the end above a well-marked knob-like prominence. Lateral parts 

 of last segment of metasome greatly expanded, forming broad posteriorly-extending 

 lamellae, each terminating in a somewhat outward-curving point, and clothed with 

 delicate sensory hairs. Urosome somewhat exceeding 2 /3 f the length of the 

 anterior division, genital segment but slightly dilated in the middle, anal segment 

 of about the same length, and smooth above. Caudal rami but little longer than 

 the anal segment, and clothed both inside and clorsally with delicate hairs; caudal 

 seta3 unusually short and conspicuously dilated at the base, that of the outer edge 

 occurring not far from the others. Anterior antenna?, when reflexed, reaching 

 about to the end of the anterior division of the body, and rather richly supplied 

 with bristles. Last pair of legs with the penultimate joint armed outside with a 

 single spine only, claw-like process comparatively short and distinctly denticulated 

 outside, extending obliquely backwards. Ovisac large, rounded. 



Male considerably more slender than female, and having the lateral parts 

 of last segment of nietasoine simple, rounded. Urosome rather narrow and 



