552 



INDEX. 



Percaand Amiurus nebulosus, food 



of, compared, 499. 

 lutea, 434|, 468f. 



Perch, Common, 434|, 460|, 479|. 

 and bull-heads, food of, com- 

 pared, 499. 

 Pirate, 499*. 



Percidse, 472f. 



Peridermium, 155, 212, 215, 218, 241. 



Peridporiacere, 393. 



Peronospora, 395, 423. 



Phanerogamic, 11. 



Phenacobius mirabilis and No- 

 tropis whipplei, food of, 

 compared, 500. 



phenacobius, Notropis, 137. 



Philadelphia Academy of Nat- 

 ural Sciences, Proceedings, 

 cited, 73. 



Phragmicoma, 51, 73, 117, 118, 124. 



Phragmidium, 155, 160, 171, 204, 

 219, 221. 



Phrasmospora, 212, 213. 



Phryganeidae, 442|, 469|, 473|. 



larva?, 454f, 461|, 466f, 470|, 

 485f. 



Phyllactinia, 392, 396, 397, 411, 414:. 



Physa, 443t, 460t, 461J, 462|, 482|. 



Phytophthora, 423. 



Pickerel, 434*. 

 Brook, 435. 

 Grass, 434. 



picta, Mamestra, 258, 305, 320. 



Pieris brassicse, disease of, 267. 

 rapse, disease of, 259. See Cab- 

 bage Worm, European. 



Pike, 434|* 



Wall-eyed, 503*. 



Pileolaria, 158, 159. 



Pirate Perch, 499*. 



Pisidium, 461|. 



Placophnrynx, 440. 



carinatus, 441*, 470*. 



Plagiochasma, 43. 



Plagiochila, 53, 111, 116, 118, 124. 



Planarian worm, 463|, 489f. 



Planorbis, 443f, 450|, 464|. 



Plants, leaves of, 491|. 

 structures, 491f. 

 unicellular, 439|, 495|. See 



under Vegetation, 

 platystomus, Lepidosteus, 464*, 



468*. 



Pleoclneta, 398. 

 Pleuranthe, 52, 90, 118. 

 Pleuroschisma, 82, 83,84, 125. 

 Pleuroxus, 450t, 452|, 463f. 

 Pleurozia, 125. 

 Plum ate! la, 442|, 450f, 452|, 458|, 



467f, 469f, 473|, 488|, 489|. 

 Podisoma, 210. 



Podospha3ra, 388, 392, 397, 412. 

 Porella, 76. 



Polyodon spathula, 464*, 468*. 

 Polyodontida?, 464. 

 Polyzoa, 450|, 454, 471|, 488|, 489|. 

 Pomoxys, 434|, 468|. 



nigromaculatus and Lepomis 



pallidus, food of, compared, 



501. 

 and Ictalurus punctatus, food 



of, compared, 498. 

 Porifera, 473|. 

 Potamogeton, 457|, 460t, 462|, 466f, 



473f. 



Potash, caustic, effect of, upon bac- 

 teria, 318. 



Prairie Farmer cited, 260. 

 Preissia, 31, 33, 117. 

 Proceedings Philadelphia Acad- 

 emy Natural Sciences 



cited, 73. 



propinquus, Cambarus, 434|. 

 Protococcus, 448|, 451. 

 Protophyta, 11. 

 Protozoa, 448f, 451|, 454|, 455f, 465, 



469|, 471|, 473t, 489|. 

 Pteridophyta, 11. 

 Ptilidmm, 81. 

 Puccinia, 145, 148, 155, 160, 161, 163, 



165, 170, 206, 208, 218, 221, 



231, 234, 235, 241. 

 Pucciniopsis, 171. 

 pulex, Daphnia, 467|. 



