NORTH AMERICAN CONCHOLOGY. 



85 



Pa. Fig. 

 107 68, 



Family Naiades Lam. 



Pa. Fig. 



109 71 



110 73 



111 72 



112 74 



121 82 

 123 



69, 70 "Unio complanatus Sol. 

 Mya complanata Sol. 

 U. purpureus Say. 

 purpurascens Lam. 

 violaceus Spengler. 

 rarisulcata Lam. 

 coarctata Lam. 

 rhombula Lam. 

 carinifera Lam. 

 Georgina Lam. 

 glabrata Lam. 

 sulcidens Lam. 

 fluviatilis Green. 

 nasutus Say. 



Mya nasuta "Wood. 

 U. rostratus Valenc. 

 radiatus Gmel. 

 Mya radiata Gmel. 

 U. Virginiana Lam. , 

 Mya oblongata Wood. 

 cariosus Say. 

 U. ovata Val. 

 ochraceus Say. 



Symphynota ochracea Lea. 



125 81 



132 



133 89 



113 75 Alasmodon arcuata Barnes. 

 Mya magaritiferaf Lin. 

 Margaritana margaritifera Lea. 



115 76 undulata Say. 



Unio undulata Say. 

 Alasmodonta undulata Barn. 

 Mya undulata Wood. 

 Margaritana undulata Lea. 

 Unio hians Val. 

 Alasmodon undulata Swains. 



116 77 marginata Sag. 



Unio varicosa Lam. 

 Alasmodonta truncata? Say. 

 Margaritana marginata Lea. 

 Mya rugulosa Wood. 



117 80 Anodon fluviatilis Dillw. 



Anodonta cataracta Say. 

 Mytilus jiuviatilis Dillw. 

 illitus Sol. 



118 78 implicata Say. 



Anodonta Newtoniensis ? Lea. 

 marginata? Say (young). 

 120 79 undulata Sag. 



A. rugosus Swainson. 



Family Mytilacea Lam. 



Mytilus edulis Lin. 



M. vulgaris Da Costa. 

 Musculus subcscruleus Lister. 

 M. borealis Lam. 

 var. pellucidus. 

 Modiola modiolus Lin. 

 Mytilus modiolus Lin. 



papuanus Desk. 

 Modiola papuana Lam. 



vulgaris Fleming. 

 Mytilus barbatus Lin. 

 plicatula Lam. 



Mytilus demissus Dillw. 



Family Pectenides Lam 



127 85 



128 86 



129 83 



130 84 



131 87 



Mytilus plicatulus Desh. 



Modiola semi-costata Conr. 

 Modiola pectiuula Gould. 

 nexa Gould. 

 discrepans Mont. 



Mytilus discrepans Mont. 

 discors 0. Fabr. 



Modiola Ixvigata Gray (var. ) 

 discors Lin. 



Mytilus discors Lin. 



Modiola discrepans Lam. 

 glandula Tott. 



Pecten magellanicus Gmel. 

 Ostrea magellanicus Gmel. 

 Islandicus Mull. 



Ostrea Islandica Mull. 



Ostrea cinnabarina Born. 

 P. Pealeii Conr. 

 134 88 Pecten concentricus Say. 



