INDEX OF GENERA AND SPECIES. 



241 



Nassa, 97. 



Nassa antiquata, 97. 

 cretacea, 97. 

 Natica, 212. 



Natica Uvasana, 212. 

 Naticina, 109. 



Naticina obliqua, 109. 

 Nautilus, Trias., 19; Cret., 59. 

 Nautilus multicameratus, 20. 

 Texanus?, 59. 

 Whitneyi, 19. 

 Nejera, 153. 



Neaera dolabraoformis, 153. 

 Neptun^ea, 88. 



Neptunsea curvirostris, 88. 

 gracilis, 90. 

 Hoffmanii, 90. 

 perforata, 89. 

 ponderosa, 88. 

 supraplicata, 89. 

 Nerinea, 113. 



Nerinea disjiar, 113. 

 JSerita, 137. 



Nerita cuneata, 137. 

 deformis, 137. 

 Neverita, 108. 



Neverita secta, 108. 

 Niso, 116. 



Niso j^olita, 116. 

 Nucula, 198. 



Nucula truncata, 198. 



Olivella, 100. 



Olivella Mathewsonii, 100. 

 Orthis, 10. 

 Orthoceratites, 19. 



Orthoceratites Blakei, 19. 

 Ostrea, 204. 



Ostrea Brewcrii, 204. 



mallei formis, 204. 



Panop.ea, Trias., 28; Cret., 148. 



PAL. VOL. I. — 31 



Panopsea conceutrica, 148. 



Eemondii, 28. 



Patella, 140. 



Patella Traskii, 140. 



Pecten, Trias., 33; Jur., 46; Cret., 



200. 



Peeten acutiplicatus, 46. 



Californicus, 201. 



deformis, 33. 



operculiformis, 201. 



Traskii, 200. 



Perissolax, 91. 



Perissolax Blakei, 92. 



brevirostris, 91. 



Pharella, 147. 



Pharella alta, 147. 



Pholadomya, 152. 



Pholadomya Brewerii, 152. 



nasuta, 152. 



Pinna, 188. 



Pinna Brewerii, 188. 



Placunanomia, 217. 



Plaeunanomia inornata, 217. 



Plicatula, 203. 



Plicatula variata, 203. 



Posidoxomya, 32. 



Posidonomy a Daytonensis, 32. 



Btella, 32. 

 Potamides, 130. 



Potamides diadema, 130. 



tenuis, 130. 



Productus, 11. 



Produetus semireticulatus, 11. 



PSEUDOLIVA, 99. 



Pseudoliva lineata, 99. 



volutseformis, 99. 

 Ptyohocbeas, 74. 



Ptychoceras sequicostatus, 74. 

 quadratus, 74. 



PUGNELLUS, 124. 



Pugnellus hamulus, 124. 



mauubriatus, 125. 



Retzia. 14 



