5Q2 



INDEX. 



vaga, Dero, 443. 

 vagans, Scopiphora, 260, 263 

 VanDervoort, W. H., machine for 

 precipitating plankton devised 

 by, 20. 

 Vaginicola, 341. 

 gigantea, 341. 

 valdiviviana, Macrobdella, 528. 

 valvata, Pterodina, 378. 

 variabilis, Brachionus, 354, 380. 



Sagittaria, 444. 

 varicans, Cyclops, 2q, 63, 64. 

 variegatus, Peloscolex, 456. 

 vegetans, Anthophysa, 323. 

 Vejdovsky, F., Anatomische Stu- 

 dien an Rhynchelmis Limosella 

 Hoffm. ( E u a x e s f i 1 i r o s t r i s 

 Grube), cited, 471. 

 vejdovskyanum, Bothri o neuron, 



452. 

 velutinus, Embolocephalus, 456. 

 ventricosus, Lampsilis, 401, 403, 407, 

 408, 40Q, 410, 4 11, 412, 413, 416. 

 Unio, 403- 

 Vermes, 356. 



Vermiculus, distinguishing char- 

 acter of, 451. 

 limosus, 451. 

 pilosus, 446, 450. 



circulatory system of, 452. 

 resemblance of Rhizodrilus 

 lacteus to, 450. 

 vernalis, Cyclops, 29, 64. 

 Verrill, A. E., 518. 



description of colors of 

 Glossiphonia complanata, 

 cited, 493. 

 on color of Dina fervida, 537. 

 Synopsis of North American 

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

 cited, 509, 513, 527. 

 verrucosa, Diplocardia, 442. 

 villosa, Pelomyxa, 317. 

 viridis, Amblyophis, 325. 



\iridis — Continued. 

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



63, 64. 

 Euglena, 312, 313, 324, 325. 

 Hydra, 337. 

 Sacculus, 366. 

 var. brevispinosus, Cyclops, 30, 



41, 62, 63, 64. 

 var. insectus, Cyclops, 31, 41, 62, 

 63, 64. 

 Yivipara, Epistylis plicatilis found 



on shells of, 339. 

 Volvocidae, 327. 



New Genus of the family of, 

 from the Plankton of the Illi- 

 nois River, 419-440. 

 Volvocinae, 419, 432, 434. 



keys to genera and species of the 



subfamily of, 435, 436-438. 

 locomotion and polarity of, 431, 



432. 

 term colony as applied to the, 



434- 

 Volvocineae, 273, 282, 287. 

 Volvox, 141, 274, 278, 280, 285, 286, 



288, 301, 327, 419, 421, 431, 434, 



437- 

 as food of rotifers, 312, 351. 

 aureus, 276, 287, 438. 

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



327, 438. 

 as food o f Asplanclma prio- 

 donta and A. herrickii, 365. 

 locomotion and polarity of, 285, 



43'- 432. 

 Vorticella, 309, 310, 311, 312, 338, 



339- 



campanula, 338. 



V. microstoma, and V. similis 

 on or among Lemnacea?, 338. 

 food of, 311. 

 found 011 roots of Lemna and on 



fixed aquatic plants, 310. 

 microstoma, 338. 

 similis, 338. 



