206 



transformed in the male Last pair of legs 1'nliaceous. with the proximal joint 

 more ur lc-s< expanded inside. 



/.' ///"//>. Thi- genus was established in the year 1893 by Th. Scott, 

 and in the same year, though somewhat later. Mr. Mra/ek established his genus 

 (t/ilin,i-,iuijiln^\ which undoubtedly i- identical with Scott's genus. Prof. Lilljeborg 

 did imt. however, accept neither this nor the preceding genus, including the spe- 

 cies of both in the old genus Canthocamptus. Yrt. in spite of the near relation- 

 ship (it the-e ;j genera, I find it convenient to keep them apart, as there are 

 some anatomical characters which seem to distinguish them pretty well from each 

 other. As to the present genus, it is chiefly characterised by the reduced num- 

 ber of joints in the anterior antenna-, and more especially by the poor develop- 

 ment of the natatory legs, which indeed seems to render the animal very little 

 apt to move freely in the water. In addition to the type species described below, 

 in recent time 3 other species have been recorded agreeing in all essential cha- 

 racters with the former, though evidently specifically distinct. They all are true 

 fresh-water form-. 



130. Moraria brevipes, G. 0. Sars. 



(PI. ( XXXIV). 



Canthocamptus l>,-ci //<>. (;. <. Sars. oversi^t af de indenlandske Ferkvandscopepoder. t'lir. Viil. 



Selsk. Forli. l6a, p. 'J-t. 



Svn: Canthocamptus gracilis, Poppe (not U. 0. Sars). 

 Mn,-,i,-'ni Anderson-Smithi, Scott. 

 Ophiocamptus Sarsii, Mruzek. 



Body rather slender and elongated, with 

 the anterior division scarcely broader than the posterior. Cephalic segment about 



the length of the 3 succeeding segments combined, rostral projection well marked 

 and tipped with a small knob-like prominence. I'rosomc fully as long as the 

 anterior division, segments sharply defined and finely spinulose at the hind edge 

 \entrally and laterally, last segment scarcely shorter than the preceding one. 

 ('aiidal rami exceeding >oine\\hat in length the anal segment, narrow oblong in 

 form and distinctly keeled dorsally. apical seta' comparatively short, seta 1 of outer 

 edge remote from the apex. Anterior antenna' rather short and thickened at the 

 ba-e. terminal part nearly as long as the proximal one. 1st pair of legs with 

 the inner ramiis -e;in-rly as long as the outer, and having the distal joint shorter 

 and narrower than the proximal one. Last pair of legs with the terminal joint 

 COmparativel) -mall, rounded oval in form, with ~> short maiginal seta'. .'! of which 



