SCIENTIFIC INDEX. 



Ixxi 



Ptilotrypa, 106, 141, 162. 

 Ptychonema, SOS. 



tabulaturn, 304. 

 Ptyyostomum orphei, 40. 

 Pulvinulina, 44, 28. 



brongniarti, 44. 



budensis, 44. 



erinacea, 45. 



haueri, 44, 52. 



menardii, 45, 42, 52. 

 Pylodexia platyktras, 40. 

 Pyrus. 5. 



Quander sandstone, 7, 3. 

 Quercus, 6, 5. 



Radiolaria, 50, 23, 52. 



Rafinesquina, 4OO, 94, 373, 396, 409, 410. 



alternata, 4O4, 371, 403, 407, 410. 

 var. loxorhytis, 4O7. 



deltoidea, 4O3, 334, 395, 396, 404. 



incrassata, 401, 402. 



kingi, 407. 



minnesotensis, 4O1, 333, 402, 403, 407, 473. 



var. inquassa, 4O3. 

 Rauffella, 75. 



fllosa, 75, 77. 



palmipes, 76. 

 Receptaculites, 56, 57, 58, 61, 63, 64, 67, 69, 71-73. 



arcticus, 59. 



bursiformis, 61 . 



calciferus, 60. 



canadensis, 66. 



devonicus, 61. 



dickhauti, 67. 



eatoni, 61. 



elegantulus, 61. 



ellipticus, 60. 



elongatus, 60. 



formosus, 66. 



fungosus, 65, 64. 



globulare, 64. 



globularis, 64. 



hemisplwricum, 66. 



infundibuliformis, GO, 61. 



infimdibulum, 66. 



insularis, 61. 



iowensis, 64. 



jonesi, 65. 



mammillaris, 60, 



monticulatus, 60. 



neptuni, 60. 



occidentalis, 60, 57-59. 



ohioensis, 65, 66. 



oweni. 57, 56, 58-60. 



sacculus. 61. 



selenoides imcene, 64. 



subturbinatus, 66. 



synopsis of American species, 59. 

 Receptaculitidse, 55, 56, 61, 68, 69, 71-74. 

 Reptaria, 107, 110. 

 Betepvra, 208. 



fenestrata. SOS. 



trentonenis, SOS. 

 Reticulipora, 214. 

 Reverse, 99. 



Rhabdoliths, 49, 23, 52. 

 Rhabdomeson, 106. 

 Rhabdomesortidse, 106, 110. 

 Rhamipora, 106. 

 Rhamnus, 5. 



Rhinidictya, 124, 91, 106, 108, 109, 128, 135, 13S, 145, 

 147,148, 155,158, 176, 187. 

 basalis, 128. 

 exigua, 131, 130, 133. 

 fldelis, 134, 126, 128, 136, 137. 

 grandis, 136, 135, 138. 

 humilis, 157, 158. 

 minima, 132, 126, 130, 133, 135, 159. 



var. modesta, 133. 



mutabilis, 125, 89, 126, 128-131, 137, 140, 346. 

 var. major, 127, 128. 139, 140. 

 var. senilis, 127. 

 neglecta, 13O, 129, 131, 137. 



var. canadensis, 130. 

 nicholsoni, 124, 128, 130-132, 135-137. 

 paupera, 129, 130-132. 

 pediculata, 137. 



trentonensis, 135, 128, 130, 134, 136-138. 

 Rhinidictyonidae, 124, 98, 102, 106, 109, 110, 147, 148, 



150, 163, 176, 187, 214. 

 Rhinopora, 106, 110, 331. 

 Rhinoporidae, 106. 

 Rhizopoda, 28. 



Rhombopora, 106, 98, 110, 111, 205, 309. 

 lineinodis, 206. 

 regularis, 206. 



Rhopalonaria, 107, 109, 114, 117. 

 botellus, 121. 

 pertenuis, 117. 

 venosa, 113*, 114. 

 Rhus, 5, 



Rhynchonella, 458, 337, 467. 

 ainsliei, 459. 

 altilis, 459. 



anticostiensis, 464*, 465. 

 argenturbica, 464. 

 capax, 462, 459, 460. 

 increbescens, 459, 461-463. 

 mica, 466. 



minnesotensis, 459, 460. 

 modesta, 467. 

 neenah, 465. 

 orientalis, 460. 

 recurvirostra, 466. 

 sancta, 461. 



Rhynchonellidse, 458, 470, 472, 473. 

 Rhynchotrema, 458. 

 ainsliei, 459. 

 capax, 462, 459, 460, 463. 

 inaequivalvis, 459, 333, 461, 463, 467. 

 var. laticostata, 461. 

 var. minnesotensis, 460. 

 Rhynchotreta, 464. 



quadriplicata, 459. 

 Rcemerella, 364. 

 Repalonana pertennis, 117. 

 Rosacilla, 120. 



