INTIF-.X. 



551 



Apsteiii. C. — Continued. 



l);is Plankton des Siisswassers 

 und seine tiuantitati\e Best- 

 inimung, cited, 2, 3, 4, 5, 8. 

 Das Si'isswasserplankton, Me- 

 thode und Kesultate der 

 (juantitativen Untersucliun*;', 

 cited, 2, 3, 4, 5. 

 Uft)er dietiuantitative Bestini- 

 niung des Plankton ini Si'iss- 

 wasser, cited, 3, 4, 5. 

 aptera, Polyarthra, 367. 

 arbuscula, Zoothamnium, 33Q. 

 Arcelia, 305, 306, 312, 318, 421. 

 dentata, 313, 314,318. 

 fond of, 311. 

 vulgaris, 313, 314, 318. 

 angulosa. 313, 314, 318. 

 discoides, 313, 314, 318. 

 Arcellidie, 315, 318. 

 arcuata, Atax, 408. 

 areolatus, Gomphogastcr, 368. 

 arniata, Traclielomonas, 325. 

 armatus, Diaptomus, 133, 135, 136. 

 Aromochelys odoratus, Opercularia 

 irritabilis found on, 340. 

 'l^)koplirya quadripartita re- 

 corded from, 342. 

 articulata, Opercularia, 340. 

 Asellus, Carchesium graniiiatuni 



found on, 33Q. 

 ashlandi, Diaptomus, q8, 100, iii, 



120, 124, 158, 167, 183, 260, 265. 

 asperrima, Quadrula, 401, 403, 408, 



409, 410, 412. 414. 

 asperrimus, I'nio, 403. 

 Aspidiogaster, 410, 414. 



concliicola infesting Unionidic, 



404. 

 infesting Lampsilis ellipsis, 405. 

 Lampsilis gracilis and L. ven- 



tricosus, 411. 

 Unionidae, 408, 409, 411, 412, 

 413, 415, 416. 



Aspidit)tus ancylus, resemblance 

 to Diaspis snowi, 398. 

 eucalypti as variety of A. })er- 



niciosus, 396. 

 hederae, synonymy of, 395. 



as type of Evaspidiotus, 395. 

 ostreteformis, resemblance of, to 



Diaspis piricola, 398. 

 perniciosus, synonymy of, 396. 

 Aspirotricha, 307, 316, 332. 

 Asplanchna, 344, 347, 364, 365, 421. 

 brightwellii, 354, 355, 364. 



food of, 351, 364. 

 Codonella cratera as food of, 336. 

 ebbesbornii, 354, 364. 



type of troplii of, 345. 

 girodi, 365. 

 Iierrickii, 354, 365. 

 food of, 351, 365. 

 parasites of, 365. 

 priodonta, 354, 364,365. 

 food of, 351, 365. 

 Asplanclinidce, 357, 364. 



seasonal distribution of, 352. 

 As])lanchnopus, 365. 



Codonella cratera as food of , 336. 

 niyrmeleo, 365. 



food of, 351, 365. 

 (juantity of food taken by, 345. 

 Astacobdella philadelphica, 542. 

 Asterionella, Diplosiga frequentis- 

 sima found on, 328. 

 rays of, eaten by rotifers, 351, 



364, 365- 

 Astrosiga, 328. 

 radiata, 329. 

 asymmetricus, M esojxi rodrilus, 



442, 468, 472, 473. 474. 475- 

 Atax al)normipes infesting I'nion- 

 i(he. 408. 

 arcuata infesting Unionidie, 408. 

 fossulatus infesting Unionida?> 



408. 

 indistinctus infesting I nionidie, 

 408. 



