Nortli American Fresh-water Cyclop idee. 81 



'91. Weiterer Beitrag znr Kenntnis tier Fauna von Gebirgsseen. 

 Zool. Anz., XIY. Jahrg., Nos. 360 n. 361, pp. 119-123 u. 126-129. 



'94. Die Tierwelt tier Juraseen. Rev. Suisse tie Zool., T. II., pp. 

 349-376, PI. XIV. 



'95. Die Fauna hochgelegener Gebirgsseen. Yerhandlung der 

 Naturf. Gesellsch. in Basel. Btl. XI., Heft I., pp. 36-133, Taf. I. 



EXPLANATION OF PLATES. 



Plate VIII. 



Fig. 1. Cyclops leuckarti Clans. 



Fig. 2. Last two segments of antenna of same. 



Fi<;. 3. Fifth foot of same. 



Plate IX. 



Fig. 1. Cyclops edax Forbes. 



Fit;. 2. Last two segments of antenna of same. 



Fig. 3. Fifth foot of same. 



Plate X. 



Fig. 1. Cyclops viridis Jnrine. 



Fit;. 2. Fifth foot of same. 



Fig. 3. Reeeptacnlum seminis of same. 



Plate XL 



Fig. 1. Variations in outer terminal spine of stylet of Cyclops viridis 



var. hrevispinosus Herrick. 

 Fig. 2. Fifth foot of same. 



Fig. 3. Keceptaculum seminis of Cyclops viridis var. insectus Forbes. 

 Fn;. 4 and 5. Fifth foot of same. 

 Fig. 6. Swimming foot of same. 



Plate XII. 



Fig. 1. Cyclops bicuspidatus Clans. 



Fig. 2. Stylet of same. 



Fig. 3. Fifth foot of same. 



Fig. 4. Receptaculum seminis of same. 



Plate XIII. 

 Cyclops albidus Jurine. 



Plate XIV. 

 Cyclops ater Herrick. 



