ENTOMOSTRACA OF MINNESOTA. 307 



Cypria nions (Chambers). 



Plate LXXXI, Figs. 612. 



? . — Cypris mons Chambers (41), pp. 153-154, Fig. 3. 

 1887.— " mons C. L. Herrick (86), p. 32. 



Length 0.70 mm. Height 0.45 mm. 



"Ovoid; tumid; highest immediately before the middle. Length 

 -^inch; height -X, Dorsal margin regularly arched, sloping more 

 rapidly behind the highest point than before it. Extremities rounded; 

 the anterior widest ventral margin very slightly sinuated. Seen from 

 above, ovate, but less tumid than Cypridopsis vidua as figured by Baird 

 and Brady (Brit. Eut. and Trans. Linn. Soc). But little or not at all 

 narrowed in front; widest a little behind the middle. Lucid spots 

 seven, near the middle of the valve; the three lower ones in a line and 

 small; one of them very small. Valves white, shining smooth, with 

 numerous almost confluent puncta. The setse of the lower antennae 

 extend beyond the apex of the claws, and the articulate appendage of 

 the third joint has its apex swollen or enlarged. Superior antennae 

 with two long and one short seta from the end of the fourth joint; two 

 from the end of the fifth joint; four long ones from the end of the 

 sixth; two long and two short from the end of the seventh (there are 

 also other short setae on the different joints). The last joint of the 

 inferior antennae is small, almost rudimentary, bearing a single large 

 claw. (Indeed, it seems to be bifid, with a claw from each branch.) 

 There are three other claws articulated to the end of the penultimate 

 joint, from which also arise four setae shorter than the claws; two 

 moderately long setae arise from about the middle of the fourth joint 

 above, and three longer ones below; the usual fascicle of five long and 

 one short setae from the third joint, just behind which is a bunch of 

 short cilia and another bunch on the under side. Abdominal ramus 

 straight, slender, with two claws, one under the other. The mandib- 

 ular palpus, with branchial appendage and two large plumose and 

 one simple setae from the end." (Chambers.) 



I have never seen specimens of the above. It is certainly very 

 closely related to Cypria opthalmica (Jurine). yet it seems to be dis- 

 tinct. 



Habitat: Pond on Mount Elbert, Colorado; altitude 11,000 feet. 

 (Chambers, 41.) 



Cypria ineqiiivalva Turner. 



Plate LXVIII, Figs. 1-8. 



1893.— Cypria inequivalva C. H. Turner (213), pp. 6-8; PI. I, Figs. 1-8. 

 1894.— " inequivalva C. H. Turner (215), p. 14. 

 1894.— " inequivalva C. H. Turner (216). 



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