Ixx 



THE PALEONTOLOGY OF MINNESOTA. 



Platystrophia, 454,458. 



biforata, 455/444, 456, 457. 

 var. crassa, 458. 



crassa, 458. 



dentata,'458. 



lynx'455. 



regularis, 455. 

 Plecanium sturi, 30. 

 Plectambonites, 413, 410, 417. 



decipiens, 417, 414. 



gibbosa, 416, 287, 334, 414, 417, 471. 



glabra, 414. 



minnesotensis. 415. 



planissima, 414. 



plicatella, 414. 



quinquecostata, 417. 



sericea, 414, 415^17, 457. 



sordida. 414. 



transversalis, 414-416. 

 var. alabamensis, 414. 

 var. prolongata, 414. 

 Plectorthis, 435, 433. 



plicatella, 436. 



whitfleldi, 437. 

 Pleurocystites angulatus, 287. 

 Pleurotomaria, 471. 

 Pleurostomella, 33, 28. 



subnodosa, 33, 52. 

 Polycarpea3, 5. 

 Polycystina, 26. 

 Polycystinse, 51. 

 Polymorpha sphcerule vitrece, 43. 

 Polynwrpha Tuberosa et Globulifera, 40. 

 Polymorphina, 28, 

 Polypora, 106, 109, 111, 209, 215. 

 Polystomella crispa var. scapha, 48. 

 Polystomellinffi, 48. 

 Polyzoarium, 98. 

 Populites, 11. 



cyclophyllus, 11,9, 22. 



elegans, 1O. 9, 22. 



gaudini, 13. 



lancastriensis, 12, 9, 22. 



litigiosus, 12, 9, 22. 



repandocrenata, 12. 



winchelli, 12, 9, 13, 22. 

 Populus, 8, 3,5,6, 11, 19 



berggreni, 13,9,22. 



cordifolia, 12. 



primEBva, 9, 3, 14. 

 Pores, communication, 98. 

 Porifera, 51, 55. 

 Poritidae, 94. 



Prasopora, 244, 98, 102, 103, 106, 109, 186, 216, 220, 

 248, 254, 255, 257, 286, 306, 315. 



afflnis, 253, 251. 



conoidea, 249, 227, 264, 284. 



contigua, 249, 220, 250. 



grayae, 244. 



insularis, 251, 207, 253, 260. 

 var. fllmorensis, 252, 254. 



lenticularis, 253, 260. 



oculata, 252, 248*, 251. 



selwyni, 25O, 348, 253. 



8imulatrix, 245, 249, 251, 254, 275, 318. 



var. orientalis, 246, 245, 248,251. 

 Preparation, methods of microscopic, 23; of chalk, 



25; of clay, 27; of shale, 26. 



Preservation, of Brachiopoda, 333; of Bryozoa, 99. 

 Primary aperture, 99. 

 Prinotus pristis, 81. 

 Prismopora, 106, 120, 111, 145. 

 Proboscina, 119, 107, 116, 120, 121. 



auloporoidoa, 119, 115. 



frondosa, 119. 115. 



tumulosa, 119, 115, 120. 

 Producta incurvata, S85, 386. 



rugosa, 410. 

 Productella, 368. 



minneapolis, 368. 

 Pronites adscendens, 378. 

 Proteacese, 5. 

 Proteoides, 5. 

 Protocrisina, 107, 109, 121, 207, 208. 



exigua, 207. 

 Protophyllum, 21, 8. 



crednerioides, 2O, 9, 22. 



integerrimum, 21, 9, 22. 



multinerve, 21. 



quadratum, 21. 

 Protorthis, 377. 

 Protosalvinia chicagoensis, 24. 



huronensis, 24. 

 Protozoa, 28. 

 Protremata, 377. 

 Proutella, 106, 110. 

 Prunus, 5. 

 Ptasnopora, 162. 

 Pterobranchia, 104. 



Ptllodictya, 165, 106, 109, 110, 145, 162-166, 167, 

 167, 169, 173, 174, 176. 



acuta, 155. 



angusta, 166. 



arctispwa, 263. 



Mpunctata, 174. 



canadensis, 166. 



excelkns, 174. 



expansa, 166. 



falcifvrmis, 167, 165. 



fimbriata, 174. 



flagellum, 166, 164. 



gigantea, 166. 



gladiola, 166, 164. 



lanceolata, 164, 166. 



lonsdalei, 174, 173. 



maculata, 165. 



magniflca, 164, 166. 



nebulosa, 166. 



pavonia, 167, 165. 



plumaria, 166. 



punctata, 174. 



ramosa, 171. 



sulcata, 166. 



superba, 174. 



variabilis, 166, 164. 



whiteavesi, 166. 



Ptilodictyonidse, 161, 102, 106, 109, 110, 162, 163, 176. 

 Ptilopora, 106, 110. 

 Ptiloporella, 106. 

 Ptiloporina, 106, 108-110. 



