INDEX. 



abiiurmipes, Atax, 408. 

 Acanthodrilidae, 444. 



found in Illinois, 442. 

 Acineta, 342. 

 food of, 311. 

 mystacina, 342. 

 food of, 342. 

 Acinetidas, 341. 

 Actinastrum, 421. 



Actinobdella, generic characters 

 of, 504. 

 inequiannulata, 504-508. 



annuli and somites of, 506-508. 

 color of, 508. 

 diagnosis of, 504. 

 general description of, 504-506. 

 Actinophrys, 321. 



sol, 313, 322. 

 Actinosphaerium, 322. 

 eichhornii, 313, 322. 

 Actinurus neptunius, 363. 

 aculeata, Anurcca, 353, 355, 383. 

 Centropyxis, 320. 

 Difflugia, 313, 314.320. 

 valga, Anura?a, 383. 

 acuminata, Uifflugia, 313, 319. 

 Metopidia, 377. 

 Notholca, 353, 355, 383. 

 Trachelomonas, 313, 325. 

 acus, Euglena, 313, 324. 

 Adinetida;, 357. 

 ^olosoma, 443. 

 hemprichii, 443. 

 tenebrarum, 443. 

 ^olosomatidte found in Illinois, 



443- 

 affinis, Cyclops, 29,65. 

 Temora, 225. 

 Temorella, 225. 



agilis, Cyclops, 29. 



Fridericia, 442. 

 Alasmodonta, capacity for infesta- 

 tion exhibited by, 414. 

 comjjlanta, 401, 403. 



parasites of, 409, 410, 412, 416. 

 confragosa, 401, 403,412. 



parasites of, 409, 410. 

 marginata, 401, 403. 



parasites of, 408, 409, 410, 412, 

 416, 417. 

 rugosa, 401, 403, 410, 412. 



parasites of, 408, 409, 410. 

 tappaniana, 401, 403. 



parasites of, 409. 

 undulata, 401, 403. 

 parasites of, 409. 

 alatus, Lampsilis, 401, 403, 408, 409, 

 410, 412, 413, 414, 416. 

 Unio, 403. 

 albidus, Cyclops, 29, 47, 62, 63, 64. 

 alboflavicans, Megalotrocha, 361. 

 albuquerquensis, Diaptomus, 98, 

 loi, 113, 115, 146, 176, 183, 184. 

 AlgcC eaten by Monostyla cornuta, 



375- 

 filamentous, as food of Euchla- 



nis, 374. 

 alienum, Lecaiiium hcsperiduni, as 

 located on authority of (ireen, 



393- 

 alveolata, Euglypha, 321. 

 AUolobophora, 44(). 



as food of Philobdella gracile, 

 518. 



caliginosa trapezoides, 442. 



fcetida, 441. 



giesleri, 442. 



mucosa, 441. 



profuga, 441. 



