__206_ 



transformed in the male. Last pair of legs foliaceous, with the proximal joint 

 more or less expanded inside. 



Remarks. This genus was established in the year 1893 by Th. Scott, 

 and in the same year, though somewhat later, Mr. Mrazek established his genus 

 Opliiocamptus, which undoubtedly is identical with Scott's genus. Prof. Lilljeborg 

 did not, however, accept neither this nor the preceding genus, including the spe- 

 cies of both in the old genus Canthoeamptus. Yet, in spite of the near relation- 

 ship of these 3 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 antennae, 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 forms. 



130. Moraria brevipes, G. 0. Sars. 



(PI. CXXXIV). 



Canthoeamptus brevipes, G. 0. Sars. Oversigt af de indenlandske Ferkvandscopepoder. Chr. Vid. 



Selsk. Forh. 1862, p. 24. 



Syn: Canthoeamptus gracilis, Poppe (not G. 0. Sars). 

 Moraria Anderson-Smithi, Scott. 

 Ophiocami)tus Sarsii, Mrazek. 





Specific Characters. Female. 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. Urosome fully as long as the 

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

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

 Caudal rami exceeding somewhat in length the anal segment, narrow oblong in 

 form and distinctly keeled dorsally, apical setae comparatively short, setae of outer 

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

 base, terminal part nearly as long as the proximal one. 1st pair of legs with 

 the inner ramus scarcely 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 

 comparatively small, rounded oval in form, with 5 short marginal setae, 3 of which 



