General Index — Vols. I-X, Inclusive. 



29 



Pleonast i :T3. 



Pleurisy-root 7 :58. 



Pleurodictyum problematicum 3:30, 



3:132. 

 Pleurophorus 2 .-35. 



iiniiiaturus n. sp. } 2:145. 



sui)Costatu.s ■?:35. 



Iropidophorus 2:35. 

 Pleurosigma spenceri 3:115. 

 Pleurotomaria 1 :96. 



inexpectans i .gd. 



newportensis 2:21. 



Stella 4:116. 



strigillata n. sp. 3:86. 



stulta 4-PI. 7. 4-PI. 7. 



sulcomarginata 4-PI. 9. 



textiligera. 4:46. 



vadosa 4-PI. 7. 

 Pleuroxus i -.^y. 



denticulatus 6 :68, 8-1 :5, 

 II :24. 



hamatus 6 :68, 8-1 :6, II :25. 



procurous i :S7. 

 Ploesoma lenticulare gen. et. sp. n. 



I -S?- 

 Ploima 6 :59. 



Plum. Wild Yellow or Red, 7:32. 

 Poa annua 7 197. 



compressa 7 :97. 



flexuosa 7 :97. 



pratensis 7 197. 



serotina 7 :97. 

 Pocket Gopher. Biological notes on 

 6:18. 



habits of 6 :20. 

 Podophyllum peltatum 7:15. 

 Pogonia ophioglossoides 7 :82. 



pendula 7 :82. 

 Poison Hemlock 7 :4i. 



Ivy 7 :28. 



Oak 7:28. 



Sumach 7 :28. 

 Poke 7:72. 

 Polk Milkweed 7:59. 

 Polarizing microscope, use of 1:131. 

 Polemoniaceae 7 :6o. 

 Polemonium reptans 7 :6o. 

 Polyarthraea 1 :48. 

 Polyarthra platyptera i :49, PI. 4. 

 Polygalaceae 7 :28. 

 Polygala sanguinea 8-II :4. 



verticillala 7 :28. 

 Polygonaceae 7 :72. 

 Polygonum acre 7 -.73. 



amphibium 7:73. 

 arifolium 7 :74. 

 aviculare 7 172. 

 biflorum 7 :85. 

 careyi 7:73. 

 convolvulus 7:74. 



dumetorum, var. scandens 



7:74. 



erectum 7 '.73. 



giganteum 7 :85. 



hartwrightii 7:73. 



hydropiper 7 -.73. 



hydropiperoides 7 ■.73. 



lapathifolium 7:73. 



var. incarna- 

 tum 7 :73. 



muhlenbergii 7 .73. 



orientale 7 :73- 



pennsylvanicum 7 ■.73. 



persicaria 7:73. 



sagittatum 7 :74. 



virginianum 7 :74. 

 Polymnia canadensis 7 .aq. 

 Polyphemopsis inornata 2:20. 



melanoides 2 :20. 

 Polypodium vulgare 7 :99. 

 Polypora fastuosa 2:82. 



gracilis 4:73. 



impressa n. sp. 4:72. 



radialis 4:74. 

 Pond Lily, Yellow 7:15. 

 Pons of Arctomys, nucleus of 5 -.63. 

 Pontederiaceae 7 :87. 

 Pontederia cordata 7 :87. 

 Poplar, White 7:79- 

 Poppy 7:16. 

 Populus alba 7 :79. 



balsamifera, var. candicans 

 7:80. 



grandidentata 7 :8o. 



monilifera 7 :8o. 



tremuloides 7 :8o. 

 Porcupine, Biological notes on 6 :23. 



habits of 6 :24. 

 Porphyry at Dog River 2:127. 

 Portulaca oleracae 7 :22. 

 Portulacaceae 7 :22. 

 Posidonomya fracta 2 :43. 



fragilis n. sp. 3:59- 

 Potamogeton natans 7 :90. 



pectinatus 7 :90. 

 Potassium, crystal system of 1:129. 



detection of in rocks 1:130. 



Fluo-silicate of 1:129. 

 Potato-vine. Wild 7:62. 

 Potentilla argentea 7 :34- 



canadensis 7 :34. 



var. simplex 



7 :34- 

 norvegica 7 :34. 

 palustris 7 :34. 

 Pot holes 9-I :i6. 

 Pouched Rat, Biological notes on 



6:18. 

 Praecommissura of opossum 6 :82. 

 Prairie Willow 7 :79. 



