ABT. 1 A NEW FRESH- WATER COPEPOD WIUiEY 5 



setae on the inner and outer borders; as, the apical setae. The 

 symbol sa is preoccupied by Giesbrecht to signify "anterior setae/» 

 while his symbol st for the terminal seta is not appHcable to Harpact- 

 icidae. 



First foot: Essentially alike in both sexes, the two-jointed inner 

 branch is shorter than the outer, and the outer border of the distal 

 joint is straight (fig. 13). In M. schmeili the inner and outer 

 branches are equally long and the distal joint of the inner branch is 



flg3. 5-6.— moraria laurentica. 5, left furcal ramus from the side, showing the dorsal crest. 

 6, Last two segments and furca from above, showing the anal operculum 



attenuated, with concave outer border. There are no setae on the 

 inner border of the outer branch; on the third joint {r^S) the four 

 setae are grouped about the apex and may be represented by the 

 formula: 2se, 2as. On the second joint of the inner branch {ri2) 

 there are three setae: 2as, Isi. The two apical setae are inner {asi) 

 and outer {ase) . The single si has a central insertion and is nearly 

 as long as the ase, these two setae are subequal. In M. schmeili the 

 28452— 27t 2 



