INDEX. 



593 



Vorticellidas, 311, 337. 



Vorticellinae, 337. 



vulgaris angulosa, Arcella, 313,314. 



Arcella, 313, 314, 318. 



discoides, Arcella, 313, 314, 318. 



Rotifer. 350, 363. 



W 



Walkeriana floriger, Coccus hun- 

 ger a synonym for, 391. 

 Ward, H. B., A Biological Exam- 

 ination of Lake Michigan 

 in the Traverse Bay Re- 

 gion, cited, 2, 3, tg. 

 A New Method for the 

 Quantitative Determina- 

 tion of Plankton Hauls, 

 cited, 18. 

 Water-bloom, 324, 420. 

 Water-snails, Epistylis plicatilis 



found on shells of, 339. 

 Westwood, J. ()., establishment of 



genus Diaptomus, 97. 

 Whitman, C. O., The Leeches of 

 Japan, cited, 509, 511. 

 The Metamerism of Clepsine, 

 cited, 479. 

 Wierzejski, A description of C. 



annulatus ( = edax) cited, 35. 

 wierzejskii, Diaptomus, 101, 107. 

 Wills, A. W., On the Structure and 

 Life History of Volvox globator, 

 cited, 276, 285. 



Wolcott, Robert H., determination 

 of Atax collections by, 407. 



Worms, aquatic, species of Rhab- 

 dostyla found on, 340. 



ypsilophorus, Atax, 408. 



Zacharias, ()., 98. 



Beobachtungen am Plankton 

 des Gr. Ploner See ' s, cited, 



313- 



Forschungsberichte a us der 

 Biologischen Station zu 

 Plon, Theil I.-IV., cited, 2. 

 F a u 11 i s tische Mittheilungen, 



cited, 304. 

 Leber die Wechselnde Quan- 

 titat des Planktons im Gros- 

 sen Ploner See, cited, 18. 

 zachariasi, Diaptomus, 99. 

 Zograf, N., Essai d'Explication de 

 1 ' origine de la Faune des lacs 

 de la Russie d ' Europe, cited, 

 226. 

 Zoological Bulletin cited, 406. 

 Zoologisches Centralblatt cited, 



226. 

 Zoothamnium, 339. 

 arbuscula, 330. 



