INDEX, 
PATULA, 204, 205, 217. 
Patula albina, 208. 
PELECYPODA, 45. 
PHILOMYCUS, 200. 
Philomycus carolinensis, 207, 202. 
PHILOMYCID, 200. 
Phryganea, 352. 
Physemoda egualis, 127. 
PuysA, 256, 707, 308, 317, 318. 
Physa adda, 308. 
altonensts, 315. 
ampullacea, 811, 315. 
aurea, 315. 
cylindrica, 311. 
elliptica, 775. 
elongata, 317. 
elongatina, 317. 
Sebigeriz, 315. 
Sontana, 308. 
gabbi, 314, 315. 
Llabra, 317. 
gyrina, 777, 308-316. 
hawniz, 311, 
heterostropha, 139, 708, 309, 310, 
314, 316. 
hildrethiana, 311. 
integra, 308, 510, 514, 975. 
minor, 31d. 
nicklinit, 315. 
oleacea, 315. 
parva, 31l. 
plicata, 31). 
sayii, 308, 7zo, 311, 314, 316. 
striata, 811. 
troostiana, 315. 
turrita, 317. 
virginea, 315. 
warrentana, 310. 
PHYSID#, 307. 
PIsiDIum, 1138, 724, 125. 
Pisidium adruptum, 127. 
abditum, 726, 129, 130, 396,| . 
400, 401, 402, 406, 408. 
arcuatum, 126, 
boreale, 401. 
cicer, 128. 
compressum, 125, 126, 728, 
397, 398, 401, 404, 406-408. 
cruciatum, 398, 401, 408. 
fallax, zoo, 401, 407, 408. 
grande, 397. 
handwerki, 06, 407. 
kirklandi, 407. 
kurtzt, 126. 
mainese, 401. 
minus, 126. 
notatum, 126. 
obscurum, 126, 
pauperculum, 407. 
' plenum, 126, 
politum, 126, 729, 897, 400. 
punctatum, 07, 404, 408. 
resartum, 126, 
Pisidium roperi, 405. 
rubellum, 126, 
rubrum, 126. 
regulare, 126. 
septentrionale, 400. 
scutellatum, o2, 403. 
splendidulum, yoo. 
tenellum, 126. 
variabile, 130, 
ventricosum, 4 
vesiculare, 400. 
virginicum, 125, 126, 727, 397, 
398, 402, 403, 408. 
walkeri, zoz, 403, 408. 
zonatum, 126. 
PLAGIOLA, 75, go. 
Plagiola donaciformis, 66, gz, 92. 
elegans, 66, 92, 93. 
PLANORBIS, 256, 257, 256, 305. 
Planorbis angu/ata, 292, 294. 
antrosus, 292. 
aroostookensis, 292. 
‘bellus, 294. 
bicarinatus, 287, 292, 293- 
296. 
billings, 297, 
brogniartiana, '296, 
campanulatus, 287, 294, 295, 
296. 
circumstriatus, 297. 
concavus, 297. 
corneus, 286, 287. 
corrugatus, 292. 
deflectus, 287, 299. 
atstortus, 288-290. 
engonatus, 292. 
exacutus, 287, 2906. 
fallax, 288. 
hyalina, 296. 
Zautus, 292. 
lens, 296. 
lenticularts, 296. 
lentus, 288, 
macrostomus, 288, 290. 
major, 292. 
megastoma, 288. 
minor, 294, 
obliguus, 299. 
parallelus, 212. 
Fay 287, 297, 298, 299, 
planorbula, 288. 
Plexata, 288, 290. 
regularis, 288. 
striatus, 292. 
trivolvis, 286, 288, 291, 293, 
295, 296. 
truncatus, 286, 290, 291, 295, 
296, 
rid 398, 408. 
vermicularis, 297. 
PLANORBULA, 300. 
Plethodon erythronotus, 33. 
PLEUROCERA, 3/0, 325, 326, 
