5$4 



INDEX. 



Protozoa and Rotifera — Continued. 

 collections examined in 

 preparation of Hempel's 

 article on, with brief de- 

 scription of waters col- 

 lected from, 301-303. 

 literature consulted in prep- 

 aration of Hempel's ar- 

 ticle on, 385, 388. 

 methods of collection and 

 preservation. of, 303. 

 as food of rotifers and fishes, 



312. 

 classification of, 314. 

 food relations of, 31 1, 324. 

 geographical distribution of, 311. 

 local distribution of, 312 314. 

 methods of capture and study of, 



310. 

 species of, found in open water, 



313- 

 synopsis of the higher groups of, 



3*4- 



typical forms of, 305-310. 



prunicola, Chioriaspis, 308. 



Fseudoripersia proposed as new 

 subgenus and a distinguishing 

 character given, 392. 



Pterodina, 274, 377, 421. 

 patina, 378- 



seasonal distribution of, 353. 

 valvata, 378. 



Pterodinidas, 358, 350, 377. 



pulchellus, Cyclops, 29, 44. 



Pump, Thresher Tank, used in col- 

 lection of plankton, 13. 



punctata, Erpobdella, 532, 535, 536, 



530- 540. 

 Nephelis, 532. 

 punctatus, Brachionus, 353, 354, 



379. 421. 

 Purdy Electric Centrifuge, 20. 

 pustulata, Quadrula, 401, 403, 409, 



410, 41 1, 412. 

 pustulatus, Unio, 403. 



pustulosa, Quadrula, 401, 402, 403, 



408, 409, 410, 412, 416. 

 pustulosus, Unio, 403. 

 pyriformis compressa, Difflugia, 



3 IQ - 

 Difflugia, 313,314. 3'Q- 

 Euchlanis, 374. 

 vas, Difflugia, 319. 

 pyrum, Phacus, 313, 326. 



quadricornis, Noteus, 353, 382. 



var. albidus, Monoculus, 47. 



var. viridis, Monoculus, 37. 

 quadridentata, Monostyla, 376. 

 quadripartita, Tokophrya, 310, 339, 



341- 



quadristriata, Xephelis, 532. 

 Quadrula asperrima, 401, 403. 



parasites of, 408, 409, 410, 412, 



414- 

 capacity for infestation exhibited 



by, 4'4- 

 ebena, 401, 403. 



parasites of, 409,410,411,412, 



413. 414. 

 granifera, 401, 403. 

 parasites of, 409. 

 lachrymosa, 401, 403, 414. 



parasites of, 408, 409, 410, 411, 

 412. 

 metanevra, 401, 403. 



parasites of, 409, 410, 412. 

 multiplicata, 401, 403. 



parasites of, 409, 410, 412,413. 

 parasites of, 405. 

 plicata, 401, 403, 409. 

 parasites of, 408, 410, 412, 413, 

 416. 

 pustulata, 401, 403. 



parasites of, 410, 411, 412. 

 pustulosa, 401, 402, 403. 

 parasites of, 408, 409, 410, 412, 

 416. 



