NORTH AMERICAN CONCHOLOGY. 



163 



Tn ge 

 14 



14 



14 



14 



14 



14 



15 



Lampsilis ventricosa Ag. MS. 

 Unio ventricosus Barues. 

 siliquoidea Ag. MS. 

 Unio siliquoideus Barnes. 

 Metaptera alata Ag. MS. 

 Unio alatus Say. 

 gracilis Ag. MS. 



Unio gracilis Barnes. 

 Complanaria rugosa Ag. MS. 

 Alasmodonta rugosa Barn, 

 alasmodontina Ag. MS. 

 Unio alasmodontinus Barn. 

 compressus Lea. 

 Margaritana arcuata Phil. 

 Alasm. arcuata Barnes, 



Page. 



15 



15 



15 



Alasmodonta marginata S. 

 Strophitus undulatus Raf. 



Anodonta undulata Say. 

 sculptilis Ag. MS. 



Unio undulata Say. 



Alasm. undulata Barnes. 



Alasm. sculptilis Say. 

 Anodonta Benedictensis 

 implicata Say. [Lea. 



fluviatilis Lea. 



Mytilus Jluviatilis Dill, 

 marginata Say. 

 Housatonica Linsley. 

 subcylindracea Lea. 



16 Cyclas similis Say. 



16 rhomboidea Say. 



16 elegans Adams. 



16 partumeia Say. 



16 pellucida Prime. 



C. calyculala Adams 



16 truncata Linsley. 



16 orbicularia Barratt. 



Cyeladidae. 



16 Pisidium dubium Gould. 

 Cyclas dubia Say. 

 minus St. 



Cyclas minor Ad. et Migh. 

 Adamsii Prime MS. 



Cyclas nitida Ad. etMigli. 

 16 ventricosum Prime. 



16 



16 



16 Montacuta elevata St. 



21. bidentata Gould. 

 16 Turtonia minuta Alder. 



Venus minuta 0. Fabr. 



Kelliada; 



17 



Kellia planulata St. 

 K. rubra Gould. 



17 Thyasira Gouldii St. 



Lucina Gouldii Phil. 

 Lucina Jlexuosa Gould 



Lucinidae. 



17 



17 



Lucina strigilla St. 



L. divaricata Auct. 

 iilosa St. 



L. radula Gould. 



Astartidae. 



17 Cardita borealis Conr. 



18 Astarte mactracea Linsley. 



A. lunulata Conr. ? 

 18 sulcata Flem. 



Pectunculus sulcatus Da C. 



A. undata Mighels. 

 1 8 Astarte P o rtlandica Mighels. 

 18 quadrans Gould. 



18 castanea Say. 



