290 



INDEX OF GENERA AND SPECIES. 



Mytilus humerus, 245. 



Inezensis, 120. 



Mathewsonii, 30, 101. 



pauperculus, 245. 



Pedroanus, 120 



quadratus, 191, 245. 

 Myurella, 78. 



simplex, 78. 



Nacella, 87. 



insessa, 87. 

 Narica, 115. 



Diegoana, 115. 

 Nassa, 47, 74, 219. 



antiquata, 219. 



Cooper ii, 47, 74. 



cretacea, 219. 



fossata, 74. 



mendica, 47, 74. 



perpinguis, 47, 75. 



tegula, 74. 

 Natica, 77. 113, 221, 259. 



alveola, 160, 223. 



clausa, 77. 



geniculata, 113. 



Herculca, 77. 



Inezana, 77. 



Lewisii, 77. 



Ocoyana, 77. 



Peclernalis, 259. • 



Recluziana, 77. 



saxea, 77. 



Uvasana, 221. 

 Naticina, 223. 



obliqua, 223. 

 Nautilus, 209. 



Nautilus angustatus, 69. 



Campbelli, 210. 



Texanus, 209. 



ziczac, 69. 

 Ne^era, 236. 



dolabraeformis, 236. 

 Neilo, 121, 122. 



abrupta, 122. 



Oregona, 121. 



pot it a, 121. 

 Willameftensis, 122. 

 Neithea, 200, 251. 



atava, 200. 



duplicicosta, 200. 



grandicosta, 200, 251. 

 Neptunea, 3, 44, 71, 146, 216. 



altispira, 44, 71. 



cretacea, 146, 216. 



decemcostata, 45, 123. 



gracilis, 149, 216. 



Hoffmannii, 149, 216. 



humcrosa, 45, 71. 



Urate, 45, 123. 



mucronata, 147, 216. 



perforata, 149, 216. 



ponderosa, 149, 216. 



recur va, 3, 71. 



supraplicata, 149, 216. 



tabulata, 71. 

 Nerinea, 231. 



dispar, 231. 

 Nerita, 170, 228. 



cuneata, 229. 



deformis, 228. 



triangulata, 229. 

 Neverita, 10, 77, 161, 222. 



callosa, 10, 77. 



