Page. 



Melania sordida, ....... 94 



— striatula, 99 



— strigosa, 95 



— subcylindracea, . 94 



— subularis, 92 



— subsolida, 94 



— sulcosa, 99 



— taitiana, 92 



— tenebrosa, 95 



— terebralis, 95 



— teres, 96 



— trochiformis, ... 100 



— tioostiana, 100 



— trilineata, 100 



— tuberculata, .... 93 



— imdulata, 92 



— venusta, 99 



— vestita, 100 



— virgata, 95 



— virginica, 90 



— viridis, 95 



— warderiana, .... 99 

 Mesodesma arctata, .... 231 



— jauresii, 23 1 



MlTRIAD^, 151 



Modiola americana, 186 



— carolinensis, .... 186 



— castanea, 186 



— discors, 1 85 



— discrepans, 185 



— modiolus, 185 



— nexa, 1 85 



— pectinula, 185 



— plicatula, 184 



Montacuta bidentata, .... 232 



Myadj!, 238 



Mya acuta, 240 



— arenaria, 240 



— truncata, 240 



Mytilid^, 181 



Mytilus boroalis, 182 



— cubitus, 183 



[Fauna — Part 6.] 



INDEX. 



Page. 



Mytilus hamatus, 183 



— incurvatus, 183 



— lateralis, 183 



— leucopheatus, ... 184 



— notatus, ., 182 



— pellucidus, 183 



— iingulatus, 183 



Natica clausa, 122 



— duplicata, 121 



— flava, 123 



— heros, 120 



— immaculata, 122 



— pusilla, 123 



— triseriata, 121 



Nucula acuta, 181 



— gouldi, 180 



— limatula, 180 



— minuta, 181 



— myalis, 180 



— navicularis, 180 



— proxima, 179 



— radiata, 179 



— sapotilla, 180 



— tenuis, 181 



— thraciseformis, ... 178 

 Odostomia exigua, 116 



— fusca, 116 



— insculpta, .... 115 



— producta, .... 116 



— seminuda, . . . . 115 

 _ trifida, 114 



Oliva literata, 152 



Osteodesma hyalina, .... 234 



OsTRACIDJE, 167 



Ostrea borcalis, 169 



— i canadensis, 170 



— equestris, 171 



— semicylindrica, . . . 171 



— virginica, 169 



Otion blainvilli, 257 



— cuvicri, 257 



Paludina bimonilifcra, ... 87 



36 



269 



Pact.. 



Paludina disscisa, 84 



— dissimilis, 86 



— genicula, 86 



— georgiana, .... 86 



— Integra, 84 



— intertexta, 85 



— isogona, 85 



— lapidaria, ..... 86 



— magnifica, .... 86 



— ponderosa, .... 86 



— subcarinata, ... 87 



— subglobosa, .... 86 



— subpurpurea, . . 86 



— transversa, .... 85 



— vivipara, 86 



Pandora trilineata, 239 



Panopea arctica, 246 



Patella Candida, 161 



Patellid^, .. , 161 



Patelloida alveus, 162 



— testudinalis, . . . 162 

 Pecten concentricus, .... 172 



— islandicus, 173 



— magellanicus, .... 173 



— nodosus, 174 



— ornatus, 174 



— purpuratus, 174 



— varius, 172 



Pectinid.5;, 172 



Petricola dactylus, 228 



— pholadiformis, . 228 

 Pholas costata, 248 



— crispata, 249 



— cuneiformis, 248 



— oblongata, 248 



— truncata, 248 



Pholid^, 247 



Physa ancillaria, 79 



— aurea, 80 



— concolor, 81 



— cylindrica, 77 



— eiliptica, 77 



