580 



INDEX. 



Pandorina — Continued. 



as food of rotifers, 312. 



polarity and direction of rotation 

 of, 284, 431, 432. 



disease of, 289. 



morum, 273, 327, 435. 437- 

 direction of rotation of, 284. 

 parasite t)f, 434. 

 papillifera var. carinata, Clepsine, 

 498. 



var. lineata, Clepsine. 493. 

 Paracyclops, 59, 65. 

 Paramaiciidce, 332. 

 Paramaecium, 332. 



aurelia, 307, 313, 332. 

 Parasite of Eudorina elegans, 435. 



of fishes, 504. 



of Hydra, 337. 



of Pandorina morum, 434. 



of Platydorina caudata, 425,434. 

 Parasites of Asplanchna herrickii, 



365- 

 of the Unionidae, A Statistical 

 Study of the, 399-418; 

 s u m m a r y o f results 

 reached, 417. 



comjiarison of infestation 

 by different, 412. 



comparison of local in- 

 festation by, 416. 



degree of infestation of in- 

 dividual hosts by, 410, 

 411, 415. 



geographical distribution 

 of, 414. 



relation of local conditions 

 to number of, and to 

 character of infestation, 



417- 

 situation of, and manner 



of infestatit)n, 404-407. 

 specific distribution of, 409. 

 effect of seasonal 



changes on, 414. 

 parasitica, Hirudo, 480. 



parasitica — Continued. 

 Placobdella, 480, 487, 488, 491, 

 492, 503- 

 parens, Cyclops, 38, 41, 42. 

 parvus, Lampsilis, 401,403,404,409, 

 410, 412, 413. 

 Unio, 337, 403. 

 patelliformis, Lecanium, 393. 

 Patten, Wm.,on d i s t r i b u t i o n of 



Heterocope, 225. 

 patina, Pterodina, 353, 378. 

 Peck, J. I., The Sources of Marine 



Food, cited, 13. 21. 

 pectinata.Synchaeta, 352, 354, 35 5,366. 

 pectorale, Gonium, 437. 

 Pedalion, 346, 355, 383. 

 mirum, 355, 384. 



seasonal distribution of, 383. 

 Pedalionidae, 359, 383. 

 Pedetes, 368. 



saltator, 368. 

 Pediastrum, 421. 



as food of rotifers, 351, 365. 

 pediculis, Trichodina,337. 

 Pelomyxa, 317. 



villosa, 317. 

 Peloscolex, 456. 



variegatus, 456. 

 pentagonus, Cyclops, 57. 

 perarmatus, Cyclops, 59, 60. 

 P e r g a n d e, Tlieo., descriptions of 



Coccidae by, cited, 390. 

 Periclueta, 441. 

 Peridinidie, 32(), 421. 

 Peridinium, 307, 329. 



tabulatum, 313, 329, 421. 

 Peritricha, 308, 309, 316, 337. 

 perniciosus ? eucalyjiti, Aspidiotus, 



396. 



Pfeffer, W., L oc omo tor i s ch e 



Richtungsliewegungen durch 



cliemische Reize, cited, 283. 



on locomotion of Gonium, 283. 



Phacus, 274, 326. 



longicauda, 313, 326. 



