212 . 



outer rainus short, uniarticulate. dilated distally. and carrying 3 strong seta'. 

 Mandibular palp Inarticulate, \vith the basal joint slightly dilated. Maxilla- with 

 the exopodal and epipodal lobules well defined, accessory lobe wanting. Maxilli- 

 peds of tlir usual structure. 1st pair of legs rather strongly built and distinctly 

 prehensile, inner rainus 3-articulate, with the outer "2 joints more or less bent 

 upnii tin- 1st. Natatory legs rather fully developed, with the inner rainus in all 

 of them distinctly 3-articulate. None of these legs transformed in male. Last 

 pair of legs \\ith the distal joint comparatively large, inner expansion of proximal 

 joint less produced than in the gen. Mi-snt-ltni. 



/.'< murk*. -This genus was rather imperfectly characterised by Boeck. and 

 indeed was not accepted by any of the British authors. Pr. Giesbrecht, however, 

 supported the Boeckian genus, though confounding it partly with another genus 

 established by Boeck. vi/., Amcirn. None of the 2 species originally recorded by 

 Boeck as members of the present genus were recognized by subsequent authors. 

 The genus is well characterised from any of the 4 preceding ones by the distinct 1\ 

 3-articulate inner raini of the natatory legs, as also by some other structural 

 differences mentioned in the above diagnosis. We know at least of 4 distinct 

 species referable to this genus, 2 of which belong to the fauna of Norway. 



134. Nitoera typiea, Boeck. 



(PI. ('XX XV III). 



i/ini'ii t//]iiru. H'.i.'ck, Oversigt over tie \>-'l Nm^r^ K \ster iagttagne CO]M-|M>,I,T. Clir. Vi<l. 



F.'i-li. 1864, p. ^14. 



S\n: CanthocamplUS pulnxti-ix. I'.nuly. 

 Nitoera oli(j<><jtn-tn, (iieslireHit. 

 Ait/firn (iiit/iliil>i<i. Urady. 



r*. I'}'iiii(li'. llody \ery slender, subliiKMr in form, with 

 the anterior division scarcely broader than the posterior. Cephalic segment not 

 attaining the length of tin- :; su, .ceding segments combined, rostral projection 

 extremely small. Trosome very slightly tapered behind, last segment shorter than 

 the preceding one and coarsely spinulosc at the end both dorsally and ventralh : 

 anal operde fringed with about 12 coarse denticles. Caudal rami much broader 

 than they are long and somewhat obliquely truncated at the end. apical seta 1 

 rather slender. Anterior antenna' almost a> long as the cephalic segment and 

 'gradually attenu.it, . ( | distally. l!rd joint a little longer than -Ith, terminal part not 

 fully attaining the length of the proximal one. 1st pair of legs with the outer 

 s much shorter than the inner, middle joint with a short seta inside, last 



