NORTH AMERICAN CONCIIOLOGY 



155 



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xx Fissurella alternata Say. 



xx Crepidula fomicata Linn. 



xx plana Say. 



xx aculeata Gmel. 



xx Chiton apiculatus Say. 



xx Bulla solitaria Say. 



xx canaliculata Say. 



xx Aplysia 



xx Sigaretus perspectivus S. 



xx Natica pusilla Say. 



xx duplicata Say. 



xx Scalaria clathrus L. 



xx multistriata Say, 



xx lineata Say. 



xx Littorina irrorata Say. 



xx Turritella ? 



xx Cancellaria reticulata L. 



xx Pleurotoma pusilla Rav. 



xx Fusus cinereus Say. 



xx Fasciolaria tiilipa L. 



xx distans Lam. 



xx gigantea Kiener. 



xx Fyrula canaliculata tinn. 



xx carica Lam. 



xx perversa Imn. 



xx pyrurn Dillw. 



xx Ranella caudata Say. 



xx Mur.ex 



xx Strombus alatus Gmel. 



xx Cassis sulcosa Lam.? 



xx Purpura cataracta Chemn. 



xx Dolium galea L. 



xx Nassa unicincta Say. 



xx obsoleta Say. 



xx vibex Say. 



xx trivittata Say. 



xx Terebra clavata Rav. 



xx dislocata >'"//• 



xx concava Say. 



xx Columbella avara Say. 



xx lunata »SY<//. 



xx Voluta junonia Chemn. 



xx Marginella spilota Rav. 



xx guttata? Dillw. 



xxi Cvula acicularis Lam. 



Pagi 

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Oliva literata Lam. 



mutica Say. 

 Unio complanatus Sol. 



confer tus Lea. 



congaraeus Lea. 



fulvUS /-"(. 



Geddingsianus Lea. 



Griffithianus Lea. 



jejunus Rao. 



palliatus Lea. 



Watereensis Lea. 



angustatus L.ea. 



foliculatus Lea. 



Vaughanianus Lea. 



modioliformis Lea. 



tenerus Rav. 



crocatus Lea. 



taeniatus Conr. 

 Margaritana marginata Say. 

 Anodon fluviatilis Sol. 

 A. cataracta Say. 



Dunlapiana Lea. 



incerta Lea. 

 Cyclas partumeia Say. 

 Cyrena Carolinensis Lose. 

 Venus mercenaria L. 



notata Say. 



paphia L. 



elevata Say. 

 Artemis concentrica Bom. 

 Astarte lunulata Conr. 

 Lucina tigerina L. 



divaricata Lj. 



edentula L. 

 Cardita tridentata Say. 

 Cardium isocardia L. 



muricatum L,. 



marmoreum Lam. 



ventricosum Brug. 

 Area incongrua Say. 



pexata Say. 



ponderosa Say. 



transversa Say. 

 Nucula approxima Say. 



acuta Conr. 



