5Q3 



XDrticfUiche, 311, 337. 



X'orticelliiia?, 337. 



vulgaris angulosa, Arcflla, 313,314. 



Arcella, 313, 314, 318. 



discoides, Arcella, 313. 314. 318. 



Rotifer, 350, 363. 



\y 



W'alkeriaiia floriger, Coccus lani- 



ger a synonym for, 3t)i. 

 Ward, H. B., A Biological Exam- 

 ination of Lake Michigan 

 in tlie Traverse Bay Re- 

 gion, cited, 2, 3, ]q. 

 A New M e t li o d for the 

 Qiiantitati\ e 1) e t ermina- 

 tion of Plankton Hauls, 

 cited. 18. 

 Water-bloom, 324, 420. 

 Water-snails, Epistylis plicatilis 



found on shells of, 339. 

 Westwood, J. O., establishment of 



genus Diaptomus, 97. 

 Wliitman, C. ()., The Leeches of 

 Japan, cited, 509, 511. 

 The Metamerism of Clepsine, 

 cited, 479. 

 Wier/.ejski, A description of C. 



annulatus ( =edax) cited, 35. 

 wierzejskii, Diaptomus, loi, 107. 

 Wills, A. W.,r)n the Structure and 

 Life History of \'ol\i)x globator, 

 cited, 276, 285. 



Wolcott, Robert H., determination 

 of Atax collections by, 407. 



Worms, aquatic, species of Rhab- 

 (lostyla found on, 340. 



ypsiiophorus, Atax, 408. 



Zacharias, ()., 98. 



Beobachtungen am Plankto'i 

 des Gr. Ploner See ' s, cited, 



3>3- 

 Forschungsberichte a us der 

 Biologischen Station /. u 

 Pl()n, Theil I.-IV'., cited, 2. 

 F a u n i s tische Mittheilungen, 



cited, 304. 

 Teber die Wechselnde Quan- 

 titiit des Planktons im Gros- 

 sen Ploner See, cited, 18. 

 zachariasi, Diaptomus, 99. 

 Zograf, N., Essai d'Explication de 

 I 'origine de la Faune des lacs 

 de la Russie d ' Europe, cited, 

 226. 

 Zoological Bulletin cited, 406. 

 Zoologisches Centralhlatt cited, 



226. 

 Zoothamnium, 339. 

 arliuscula, 331). 



