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. 

 NE^ERA, 153. 



Nesera dolabrseformis, 153. 

 NEPTUN^EA, 88. 



Neptunaea curvirostris, 88. 

 gracilis, 90. 

 Hoifmanii, 90. 

 perforata, 89. 

 ponderosa, 88. 

 supraplicata, 89. 

 NERINEA, 113. 



Nerinea dispar, 113. 

 NERITA, 137. 



Nerita cuneata, 137. 

 deforrais, 137. 

 NEVERITA, 108. 



Neverita secta, 108. 

 Niso, 116. 



Niso polita, 116. 

 NUCULA, 198. 



Nucula truncata, 198. 



OLIVELLA, 100. 



Olivella Mathewsonii, 100. 

 ORTHIS, 10. 

 ORTHOCERATITES, 19. 



Orthoceratites Blakei, 19. 

 OSTREA, 204. 



Ostrea Brewerii, 204. 



malleiformis, 204. 



PANOP^EA, Trias., 28; Cret., 148. 



PAL. VOL. I. 31 



Panopaea concentrica, 148. 



Remondii, 28. 

 PATELLA, 140. 



Patella Traskii, 140. 

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



200. 



Pecten 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. 



Placunanomia inornata, 217. 

 PLICATULA, 203. 



Plicatula variata, 203. 



POSIDONOMYA, 32. 



Posidonomya Daytonensis, 32. 

 Stella, 32. 



POTAMIDES, 130. 



Potauiides diadema, 130. 



tennis, 130. 

 PRODUCTUS, 11. 



Productus semireticulatus, 11. 

 PSEUDOLIVA, 99. 



Pseudoliva lineata, 99. 



volutffiformis, 99. 

 PTYCHOCERAS, 74. 



Ptychoceras sequicostatus, 74. 



quadratus, 74. 

 PUGNELLUS, 124. 



Pugnellus hamulus, 124. 



manubriatus, 125. 



EETZIA, 14. 



