INDEX 631 
Opossum, 508, 510, 513-515, 603, 604. 
Opsopceodus emiliz, 385, 395, 403, 417, 
428, 437. 
Orthoptera, 471, 475. 
Orthurethra, 494. 
Oscillatoria, 19. 
Sppi2l. 31 
Osmoderma scabra, 455. 
Osmorrhiza longistylis, 453. 
Osphranticum labronectum, 283. 
Osprey, American, 475. 
@stracodas 15. 165 257258) 2600 33.6) 
Ostrya, 457. 
virginiana, 458, 466, 467, 469, 470, 
479. 
Oiier, S77, Sehile 
Ovenbird, 469, 479, 480. 
Owls, 443, 511, 518, 524, 538, 544, 549, 
Hoa 905; 562, 586. 
P 
Paddle-fish, 384, 393, 403, 413. 
Palolo worm, 42. 
Paludicella, 288. 
Pandorina, 68, 80, 82, 86. 
morum, 84, 292, 323. 
Panther, 569, 603. 
Paramecium, 117. 
aurelia, 126. 
Sppe, L207 
Parascaphirhynchus albus, 384, 407. 
See also Sturgeon, White. 
Patrobus longicornis, 471. 
Patula, 495. 
Pectinatella, 288. 
magnifica, 288. 
Pedalion mirum, 219-221, 292, 336. 
Pedetes saltator, 221. 
Redkasiriumbpay 22.2552 i Sie look 
boryanum, 26-28, 292, 315. 
pertusum, 26, 27, 28-30, 32, 69, 292, | 
298) 315: 
Pelecypoda, 473, 484, 491. 
Penium, 62. 
Pennsylvania Persicaria, 473. 
Penthe obliquata, 471, 478. 
Penthorum sedoides, 475. 
Perca flavescens, See also 
Perch, Yellow. 
Perch, Log-, 389, 400, 403, 431. 
also Percina caprodes. 
Yellow, 389, 400, 402, 413, 417, 422, 
416, 437, 
See 
425, 431. See also Perca flaves- 
cens. 
Percina caprodes, 389, 437. See also 
Log-perch. 
Percopsis guttatus, 415, 424, 437. See 
also Trout perch. 
Peridiniide, 68, 85, 159. 
Peridinium tabulatum, 68, 84, 323. 
Peritricha, 115, 127, 208. 
Peromyscus leucopus, 506, 545, 546. 
See also Wood-mouse, White- 
footed. 
noveboracensis, 539-544. See also 
Wood-mouse, White-footed. 
maniculatus bairdii, 504, 544-549. 
See also Prairie-mouse, White- 
footed. 
michiganensis, 544. 
nuttalli aureolus, 549. 
Pewee, Wood, 468, 478, 480. 
Phacus, 68. 
longicauda, 85, 292, 323. 
Var. torta, 85 (see Errata), 
pleuronectes, 85, 292, 323. 
pyrum, 85. 
triqueter, 85. 
Pheophycee, 14. 
Phanerogamia, 13, 16, 62. 
Phenacobius mirabilis, 386, 437. See 
also Minnow, Sucker-mouthed. 
Philodina, 113, 143. 
citrina, 141. 
macrostyla, 144. 
megalotrocha, 141, 328. 
Philomycide, 495, 
Philomycus, 485, 495. 
carolinensis, 480, 485, 487, 495. 
Phloeothripide, 364-378. 
Pheebe, 476, 478. 
Physa, 458, 489, 492. 
Physa gyrina, 450, 451, 454, 456, 459, 
460, 461, 462, 464, 467, 470, 471, 
