INDEX 



Acanthina 181 



engonata 181 



lapilloides 181 



lugubris 182 



spirata 182 



Acmaea 216 



asmi 218 



depicta 221 



incessa 220 



instabilis 221 



niitra 219 



paleacea 222 



patina 217 



pelta 217 



persona 218 



scabra 219 



spectrum 216 



triangularis . . .222 



ActcTon 120 



painei 120 



punctocselatus . . 120 



Adula 37 



falcata 37 



stvlina 38 



Alexia 128 



Amalthea 210 



antiquata 210 



cranioides 210 



tumens 210 



Amiantis 11 



callosa 11 



Amicula 261 



pallasii 261 



Amnicola 314 



micrococcus ...314 



Amphissa 165 



bicolor 166 



corrugata 165 



undata 165 



versicolor 165 



Ampullina 213 



purpurea 213 



Anaplocamus .... 199 



borealis 199 



Ancylus 310 



altus 310 



caurinus 311 



fragilis 310 



newbcrryi 310 



patelloides . . . .310 



Angulus 90 



obtusus 90 



Anisodoris 124 



nobilis 124 



Aiiodonta 302 



beringiana 303 



californiensis ..303 



cygnea 302 



impura 303 



nuttalliana . . . .303 

 oregonesis . . . .302 

 wahlametensis .303 



Anomia 54 



lampe 54 



peruviana 54 



Aphallarion 270 



buttoni 270 



Aplexa 312 



hypnorum 312 



Aplysia 123 



californica 123 



Area 29 



multicostata ... 29 



mutabilis 29 



reticulata 29 



Archidoris 124 



montereyensis ..124 



Arctoscala" 184 



Argobuccinum . . 189 

 oregonense .... 189 



Argonauta 296 



pacitica 296 



Ariolimax 270 



californicus . . . .270 

 columbianus ...270 

 hemphilli 271 



niger 270 



Asbmunella 290 



asbmuni 291 



cbiricabuana . . .292 



levettei 292 



pseudodonta ...291 

 rhyssa 290 



Astarte 60 



alaskensis 60 



esquimalti 61 



polaris 61 



vernicosa 61 



Astrsea 225 



in?equalis 225 



undosa 225 



Atrina 30 



oldroydii 30 



Axinea 29 



intermedia .... 29 



Axinopsis 66 



sericatus 66 



viridis 66 



Axinus 65 



Batbytoma 131 



carpenteriana . . 131 



gabbiana 132 



keepi 132 



stearnsiana .... 131 

 tryoniana 131 



Bela 135 



Beringius 152 



crebricostatus ..152 



frielei 153 



kennicottii 153 



Bifidaria 294 



armifera 294 



Binneya 271 



notabilis 271 



Bittium 195 



esuriens 195 



filosum 195 



quadrifilatum . . 195 



Boreotropbon ...172 



