SCIENTIFIC INDEX. lxxi 
Ptilotrypa, 106, 141, 162. 
Ptychonema, 303. 
tabulatum, 304. 
Ptygostomum orphei, 40. 
Pulvinulina, 44, 28. 
brongniarti, 44, 
budensis, 44. 
erinacea, 45. 
haueri, 44, 52. 
menardii, 45, 42, 52. 
Pylodexia platyletras, 40. 
Pyrus, 5. 
Quander sandstone, 7, 3. 
Quercus, 6, 5. 
Radiolaria, 50, 28, 52. 
Rafinesquina, 400, 94, 373, 396, 409, 410, 
alternata, 404, 371, 403, 407, 410. 
var. loxorhytis, 407. 
deltoidea, 403, 334, 395, 396, 404. 
incrassata, £01, 402. 
kingi, 407. . 
minnesotensis, 401, 333, 402, 403, 407, 473. 
var. inquassa, 403. 
Rauffella, 75. 
fllosa, 75, 77. 
palmipes, 76. 
Receptaculites, 56, 57, 58, 51, 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. 
hemisphericum, 66. 
infundibuliformis, 60, 61. 
infundibulum, 66. 
insularis, 61. 
dowensis, 64. 
jonesi, 65. 
mammillaris, 60, 
monticulatus, 60. 
neptuni, 60. 
occidentalis, 60, 57-59. 
ohioensis, 65, 66. 
oweni, 57, 56, 58-60. 
sacculus, 61. 
selenoides iowene, 64. 
subturbinatus, 66. 
synopsis of American species, 59. 
Receptaculitide, 55, 56, 61, 68, 69, 71-74. 
Reptaria, 107, 110. 
Retepora, 208. 
fenestrata, 208. 
trentonenis, 208. 
Reticulipora, 214. 
Reverse, 99. 
Rhabdoliths, 49, 23, 52. 
Rhabdomeson, 106. 
Rhabdomesontid, 106, 110. 
Rhamipora, 106, 
Rhamuus, 5. 
Rhinidictya, 124, 91, 106, 108, 109, 128, 135, 138, 145, 
147, 148, 155, 158, 176, 187. 
basalis, 128. 
exigua, 131, 130, 133. 
fidelis, 134, 126, 128, 136, 137. 
grandis, 136, 135, 188. 
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, 130, 129, 131, 137. 
var. canadensis, 130. 
nicholsoni, 124, 128, 130-132, 135-137. 
paupera, 129, 180-132. 
pediculata, 137. 
trentonensis, 135, 128, 130, 134, 136-138. 
Rhinidictyonida, 124, 98, 102, 106, 109, 110, 147, 148, 
150, 163, 176, 187, 214. 
Rhinopora, 106, 110, 331. 
Rhinoporide, 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. 
capa, 462, 459, 460. 
increbescens, 459, 461-463. 
mica, £66. 
minnesotensis, 459, 460. 
modesta, 467. 
neenah, 465. 
orientalis, 460. 
recurvirostra, 466. 
sancta, £61. 
Rhynchonellida, 458, 470, 472, 473. 
Rhynchotrema, 458. 
ainsliei, 459. 
capax, 462, 459, 460, 463. 
ineequivalvis, 459, 333, 461, 463, 467. 
var. laticostata, 461. 
var. minnesotensis, 460. 
Rhynchotreta, 464. 
quadriplicata, 459. 
Remerella, 364. 
Repalonana pertennis, 117. 
Rosacilla, 120. 
