INDEX TO GENERA AND SPECIES. 



279 



Nuttallina scabra, 



Ocinebra circumtexta, 



gracillima, 

 Odostomia Beringi, 

 Ompbalotropis nebulosa, 

 Oncliidella boreal is, 

 Onychoteuthis lobipennis, 

 Operculatum indicum, 

 Opbicardelus paludosus, 



I'acbypoirja gibberosum, 

 Paludinella vitiana, 

 Partula bicolor, 

 Brazieri, 

 concinna, 

 expansa, 

 turricula, 

 Patella exarata, 

 Patula solitaria, 

 Pecten Alaskensis, 

 Pedicularia Japonica, 

 Perna Hawaiiensis, 

 Persa melanostoma, 

 Persicula canalis, 



cavernula, 



decortica, 



dubiosa, 



Harveyensis, 



inultilauiellata, 



Otareae, 



proxima, 



rudis, 



tenuicostata, 

 Pitys tamuloides, 



Youngi, 

 Platidia anomioides, 

 Plecotrema hirsuta, 

 Pleurotama rugosa, 

 Pneumodermon Pacificum, 

 Promacrus nasutus, 

 Protbyris elegans, 

 Purpura columellaris, 

 Pytbia lentiginosa, 

 perovata, 



134 



172 

 172 

 117 



197 

 135 



96 

 22 



220 



130 

 224 

 ~26 



27 

 196 



26 

 196 

 198 

 176 

 155 

 121 



25 

 224 

 227 

 226 

 228 

 103 

 228 

 230 

 228 

 230 

 227 

 229 

 225 

 229 



68 

 219 



24 

 139 

 5 

 8 

 110 

 220 

 221 



