INDEX. 



551 



Apstein, C. — Continued. 



Das Plankton des Siisswassers 

 und seine quantitative Best- 

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

 Das Siisswasserplankton, Me- 

 thode und Resultate der 

 quantitativen Untersuchung, 

 cited, 2, 3, 4, 5. 

 Ueber die quantitative Bestim- 

 mung des Plankton im Siiss- 

 wasser, cited, 3, 4, 5. 

 aptera, Polyarthra, 367. 

 arbuscula, Zoothamnium, 339. 

 Arcella, 305, 306, 312, 318, 421. 

 dentata, 313, 314,318. 

 food of, 311. 

 vulgaris, 313, 314, 318. 

 angulosa, 313, 314, 318. 

 discoides, 313, 314, 318. 

 Arcellidae, 315, 318. 

 arcuata, Atax, 408. 

 areolatus, Gomphogaster, 368. 

 armata, Trachelomonas, 325. 

 armatus, Diaptomus," 133, 135, 136. 

 Aromochelys odoratus, Opercularia 

 irritabilis found on, 340. 

 Tokophrya quadripartita re- 

 corded from, 342. 

 articulata, Opercularia, 340. 

 Asellus, Carchesium granulatum 



found on, 339. 

 ashlandi, Diaptomus, 98, 100, in, 



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

 asperrima, Quadrula, 401, 403, 408, 



409, 410, 412, 414. 

 asperrimus, Unio, 403. 

 Aspidiogaster, 410, 414. 

 conchicola infesting Unionidae, 



404. 

 infesting Lampsilis ellipsis, 405. 

 Lampsilis gracilis and L. ven- 



tricosus, 41 1. 

 Unionidte, 408, 40Q, 411, 412, 

 413, 415, 416. 



Aspidiotus ancylus, resemblance 

 to Diaspis snowi, 398. 

 eucalypti as variety of A. per- 



niciosus, 396. 

 hederae, synonymy of, 395. 



as type of Evaspidiotus, 395. 

 ostreaeformis, 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 trophi of, 345. 

 girodi, 365. 

 herrickii, 354, 365. 

 food of, 351, 365. 

 parasites of, 305. 

 priodonta, 354, 364, 365. 

 food of, 351, 365. 

 Asplanchnidae, 357, 364. 



seasonal distribution of, 352. 

 Asplanchnopus, 365. 



Codonella cratera as food of, 336. 

 myrmeleo, 365. 



food of, 351, 365. 

 quantity of food taken by, 345. 

 Astacobdella philadelphica, 542. 

 Asterionella, Diplosiga frequentis- 

 sima found on, 328. 

 rays of, eaten by rotifers, 351, 



3"4, 365- 

 Astrosiga, 328. 

 radiata, 329. 

 asymmetricus, M eso po rodrilus, 



442, 4"8, 472, 473, 474, 475. 

 Atax abnormipes infesting Union- 

 idae, 408. 

 arcuata infesting Unionidae, 408. 

 fossulatus infesting I " m' > > 1 1 i < 1 . 1 ■ • 



408. 

 indistinctus infesting Unionidae, 

 408. 



