Korth American Fresh-water Ostracoda. 455 



nultimate segment, which is twice as long as broad. 

 Shorter terminal seta twice a^ long as the terminal seg- 

 ment and a third as long as the longer similarly directed 

 seta; reflexed seta but slightly longer than the longer 

 terminal one. 



Caudal rami (Fig. 1) short, stout, curved, much broad- 

 ened at the base, and fully seven times as long as wide. 

 Terminal claw faintly toothed, nearly straight, but 

 hooked at its extremity, and a third as long as the 

 ramus; subterminal claw nine tenths as long as the ter- 

 minal one and similar to it. Terminal seta as long as 

 ramus is wide; dorsal seta four fifths as long as the sub- 

 terminal claw, and distant twice the width of ramus 

 from it. Dorsal margin slightly indented at its proximal 

 third. 



Atlanta, Ga., 1895 (Turner); Pools, Normal, 111., March 

 27, 1881 (Coll. 111. State Lab. Nat. Hist). The species 

 occurs also in Russia, Sweden, England, and France. 



Candona sigmoides n. sp. (PI. XLV., Fig. 4-11.) 



A large elongate form, the male being 1.25 mm. long 

 and .63 mm. high. 



Surface of shell without any special markings; anterior 

 and posterior extremities finely hairy. The testes show 

 through the shell in the form of four curved bands 

 which coalesce posteriorly. (Fig. 4.) 



Seen from the side (Fig. 4), the shell of the male is 

 much higher posteriorly, the greatest height being about 

 half the length; anterior extremity evenly rounded, nar- 

 row; posterior sloping ventrally. Dorsal margin rather 

 evenly rounded; ventral, deeply sinuate anterior to the 

 middle of the shell. 



Second foot (Fig. 7) five-segmented, its longer terminal 

 seta one and three fifths times as long as the last three 

 segments combined ; shorter seta as long as the two 

 segments preceding the last, or five times the length of 

 the last segment. 



