521 
Pieris eperia, 75. 
Pinguicula vulgaris, 147. 
Pinna, 336. 
abrupta, 344. 
aculeata, 345. 
aequilatera, 345. 
affinis, 344. 
angustana, 345. 
arata, 344. 
breweri, 344. 
costata, 342. 
depressa, 344. 
d'orbigni, 345. 
electrina, 344. 
fimbriatula, 344. 
flabellum, 344. 
flexicostata, 342. 
gallieni, 342. 
hanleyi, 345. 
hartmanni, 344. 
inaequicostata, 342. 
incurvata, 345. 
intumescens, 344. 
ivaniskiana, 339. 
maxima, 344. 
menkei, 346. 
miliaris, 344. 
minuta, 346. 
multisulcatus, 344. 
muricata, 344. 
nigrina, 339. 
nobilis, 345. 
pernula, 344. 
prisca, 338. 
quadrangularis, 342, 343. 
radiata, 346. 
restitua, 344. 
rotundata, 345. 
rudis, 343, 344. 
rugosa, 344. 
saccata, 340, 345. 
semicostata, 345. 
squamosa, 345. 
subcuneata, 344. 
tenuistriata, 346. 
tetragon a, 343. 
zebuensis, 344. 
Pinnidae, 335. 
Pithecops phoenix, 70. 
Planocephalus, 373. 
Plantago eriopoda, 149, 154. 
major, 147, 163. 
rugelii, 163. 
Plants, geographic limits of, 140. 
Plastingia tessellata, 81. 
Platysamia, 84. 
cecropia, 93, 98, 103. 
gloverii, 93. 
Pleistocene changes of level in America, 
454. 
Plesioneura alysos, 81. 
Plusia gamma, 94. 
Poa alpina, 147. 
laxa, 147. 
nemoralis, 152. 
pratensis, 152. 
serotina, 152. 
Poa tenuifolia, 149, 152. 
Polanisia trachysperma, 148. 
Polydrosus, 381. 
Polygonum aviculare, 165. 
convolvulus, 162, 166. 
erectum, 165. 
hydropiper, 166. 
pennsylvanicum, 166. 
persicaria, 166. 
viviparum, 147. 
Polyommatus baeticus, 72. 
Polyzoa, 208. 
Portulacableracea, 159. 
Pot-hole at Bolton, Yt., 304; at Hingliam, 
Mass., 173. 
Potamogeton marinus, 156. 
Potentilla anserina, 159. 
effusa, 148. 
hi’fpiana, 148. 
norvegica, 159. 
pennsylvanica, 148, 154. 
Prasopora, 202. 
lycoperdon, 208. 
Precis intermedia, 63. 
iphita, 63. 
Primitia, 205, 207, 208, 210. 
Primula farino^a, 147. 
mistassinica, 147. 
Pseudamathusia ribbei, 59. 
Pseudergolis avesta, 63. 
Pseudohazis, 84, 102. 
eglanterina, 93. 
Psoralea, 153. 
argophvlla, 154. 
esculenta, 154. 
Pterinea trentonensis, 208. 
Pteronites aliiforme, 338. 
Pterophorus periscelidactylus, 88. 
Pterostoma, 95. 
Ptilophora, 95. 
Purpura lapillus, 307. 
Putnam, F. W. Ancient hearths discov- 
ered in the Little Miami Valley, 
268. 
Pycnanthemum, 153. 
Pyrola rotundifolia, 147. 
Quebec, geology of the environs of, 202 ; 
bibliography of, 221. 
Ranunculus acris, 157. 
affinis, 147. 
aquatilis, 47. 
cymbalaria, 156. 
Rhinanthus crista-galli, 147. 
Rhinopalpa megalonice, 63. 
Rhododendron maximum, 170. 
Rhynchophora, tertiary, of North Amer- 
ica, 370. 
Ribes liudsonianum, 147. 
setosum, 156. 
Richards, R. H. The pot-hole at 
Bolton, Yt., 304. 
Riley, C. Y. The life-history of the 
digger-wasp, 370. 
Rosa acicularis, 148. 
arkansana, 148, 154, 160. 
