592 



\aga, Den I, 443. 



vagans, Scopipliura, 260, 263. 



VanDervoort, W. H., machine for 



precipitating plankton devised 



by, 20. 

 Vaginicola, 341. 



gigantea, 341. 

 valdiviviana, Macrobdciia, 528. 

 \al\ata, Pterodina, 378. 

 variabilis, Brachionus, 354, 380. 



Sagittaria, 444. 

 varicans, Cyclops, 2q, 63, 64. 

 variegatus, Peloscolex, 456. 

 vegetans, Anthopliysa, 323. 

 Vejdovsky, F., Anatomisclie Stu- 



dien an Khynchelmis Limosella 



Hoffm. (Euaxes filirostris 



Grnbe), cited, 471. 

 \ejdo\skyanuni, Bo t li r i o neuron, 



45^- 

 \elutinus, Kinbolocepiialus, 436. 

 ventrici>sus, Lampsilis, 401, 403, 407, 

 408, 40(), 410, 411, 412, 413, 416. 

 Unio, 403. 

 Vermes, 356. 



Vermiculus, distinguishing char- 

 acter of, 451. 

 limosus, 451. 

 pilosus, 446, 450. 



circulatory system of, 452. 

 resemblance of K li i z o d r i 1 u s 

 lacteus to, 450. 

 vernalis, Cyclops, 2q, 64. 

 Verrill, A. E., 518. 



description of colors of 

 Glossiphoin'a complanata, 

 cited, 4q3. 

 on color of Dina ferxida, 537. 

 Synopsis of Xortii American 

 F r e s h - w a t e r Leeches, 

 cited, 50q, 513, 527. 

 \ errncosa, Diplocardia, 442. 

 \illosa, Pelomyxa, 317. 

 viridis, Amblyophis, 325. 



\i rid is — Continued. 



Cyclops, 2q, 30, 37, 41, 43, 48, 62, 



63. 64. 

 Euglena, 312, 313, 324, 325. 

 Hydra, 337. 

 Sacculus, 366. 

 \ar. brevispinosus, Cyclops, 30, 



41, 62, 63, 64. 

 \ar. insectus, Cyclops, 31, 41, 62, 

 63, 64. 

 X'ivipara, Epistylis plicatilis found 



on shells of, 339. 

 Vohocida:', 327. 



New Genus of the family of, 

 from the Plankton of the Illi- 

 nois Ri\er, 41Q-440. 

 \'ol\-ocina;, 419, 432, 434. 



keys to genera and species of the 



subfamily of, 435, 436-438. 

 locomotion and polarity of, 431, 



432. 

 term colony as a])plied to the, 



434- 



\'ol\-ocineie, 273, 282, 287. 

 \'ol\dx, 141, 274, 278, 280, 285, 286, 

 28S, 301, 327, 410, 421, 431, 434, 



437- 

 as food of rotifers, 312, 351. 

 aureus, 276, 287, 438. 

 globator, 276, 285, 287, 312, 313, 



327,438. 

 as food of Asplaiichna prio- 

 donta and A. herrickii, 365. 

 locomotion and polarity of, 285, 



431- W- 



Vorticella, 30Q, 310, 311, 312, 338, 



33Q- 

 campanula, 338. 



\'. microstoma, and \'. similis 

 on or among Lenniaceit, 338. 

 f.HHl of, 311. 

 found on roots of Eemna and on 



fixed a(|uatic plants, 310. 

 microstoma, 338. 

 similis, ^(^8. 



