234 
Oxynoticeras, 30, 33, 34, 47, 48, 54, 5D, (15. ( 7, 18; 
80, 82, 83, 84, 101, 106, 107, 108, 109, 114, 116, 
148, 214. 
Oxynoticeras Aballoense, 220. 
Buvigneri, 220. 
Castagnolai, 216. 
Collenoti, Geyer, 213. 
Greenoughi, 69, 213, 214, 216, 218. 
zuibali, 69, 83, 115, 214, 215, 218, 219. 
Guibalianum, 218. 
Janus, 221. 
Lotharingum, 34, 51, 69, 78, 83, 112 note, 214, 
216,218) 220, 
Lymense, 69, 83, 102, 217, 218. 
numismale, 103, 217. 
Oppeli, 69, 70, 102 note, 103, 217, 221. 
oxynotum, 21, 40, 46, 69, 83, 101, 102, 199, 214, 
215,216, 218, 221, 
Simpsoni, 69, 102, 217 
Oxynotum Subseries, 106. 
Oxynotus Bed, 107, 109, 111, 129, 201, 2138, 215. 
Zone, 106, 107, 116. 
Pachydiscus, 23. 
Packard, 3, 43, 47, 52. 
Paracme, x, 21, 107, 112. 
Parisian Basin, 87. 
Parallel Character of Differentials, 84. 
Parallel Series, 27. 
Parallelism, 22, 25, 27, 28, 48, 50, 53, 109. 
Parthenkirchen, 93. 
Pathological Species, 30. 
Pavlow, 115. 
Pelecypoda, 8. 
Peltoceras athleta, 22, 42. 
Pentacrinus Bed, 198. 
Pentacrinus tuberculatus, 153, 155, 
Perisphinctes, 24, 87. 
Perisphinetes aberrans, 33. 
Defranci, 24. 
Peru, 86, 87, 115, 118, 151, 153, 169. 
Petschora Land, 86. 
Pettos Stock, 23. 
Pfonsjoch, 122, 129, 134, 137. 
Pforen, 168, 171, 197. 
Phragmoceras perversum, 34. 
Phylembryo, 8, note. 
Phylloceras, 27, 122 note. 
soblayi, 216. 
Phymatoceras enervatum, 24. 
Physical Selections, ix, 52. 
Physical Surroundings, action of, x, 52 note, 53. 
Physiological Equivalent, x. 
Pictet, 33. 
Pictetia, 24. 
Piette, 123. 
Piloceras, 12, 13, 52. 
Pinnacites, 51, 80. 
Placenticeras, 31, 32. 
INDEX. 
Placenticeras placenta, Meek, 31. 
Planicosta Bed, 105, 209, 213. 
Planorbide, 29, 30, 31, 78, 118. 
Planorbis Bed, 57, 85, 90, 91, 92, 94, 104, 110, 114, 
115, 116, 122, 129, 184, 197. 
Planorbis Zone, 29, 90, 91, 92, 94, 104, 107, 108, 116. 
Planulati, 42. 
Plicatifera, 24, 42. 
Plicatus Stock, 25, 54, 55, 57, 
124 E22, 128; 
Pliensbach, 210, 215. 
Polar Homozoic Band, 87. 
Poland, 86. 
Polygenesis, 118. 
Polyphylletic Origin of Forms, 31. 
Popanoceras, 4, 5, 24. 
Popanoceras antiquum, 4, 5, 23. 
Kingianum, 5, 1238, 124. 
Portlock, 164. 
Portugal, 86. 
80, 81, 88, 107, 112, 116, 
Pouriac, 115. 
Pourtalés, 121. 
Primary Radicals, 3, 22. 
Primitive Radicals, 3, 16, 52. 
Primordialide, 51. 
Prodissoconch, 8, note. 
Progressive Characteristics, Genesis of, 71. 
Progressive Forms, Morphogical Equivalence in, 21, 
99 
Progressive Series, 25. 
Prolecanites, 3, 4, 5. 
Prolecanitide, 4. 
Pronorites, 4. 
Protection, effect of, 47. 
Protembryo, 8. 
Protoconch, 1, 8, 11, 18, 14, 49. 
Protozoa, 8. 
Provence, 91, 118, 114, 116. 
Psiloceran Branch, 120. 
Psiloceran or Radical Stock, 54, 57, 71, 80, 81, 107. 
Psiloceras, 5-7, 18, 22, 28, 34, 35, 52, 54, 56-60, 71- 
73, 75, 78, 80, 84, 85, 89, 90, 92, 93, 101, 102, 
113, 114, 117, 118, 120, 125-128, 131, 186, 137, 
155, 195, 197, 215. 
Psiloceras acutidorsale, 162. 
aphanoptychum, 123. 
Atanatense, 122. 
Berchta, 123. 
caleimontanum, 123, 124. 
caliphyllum, 54, 55, 57, 85, 90, 112, 117, 122. 
crebricinctum, 123. 
(goc.) crebrispirale, 124. 
(Megoc.) Portisi, 124. 
cryptogonium, 123. 
Hagenowi, Wih., 90. 93, 120, 123, 124, 174 note. 
Kammerkarense, 123, 124. 
longipontinum, Wih., 91, 98, 122, 
majus, 1238. 
mesogenos, 21, 75, 124. 
megastoma, 96. 
123. 
