LIST OF MOLLUSCA. 



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 1 



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 2 



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4 



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it 



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5 



3 

 6 



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1 



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 a 



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7 



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5 a 

 8 



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m a; 



l« 



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9 



>> 



a 



si 



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OM 



M 



10 



Pelecypoda. 

 Anornia simplex Orb . 





















x 



Astarte crenata Gray 













X 



X 









X 



Astarte undata Gld 







X 







X 



... 



X 

 X 



X 



Callocardia morrhuane Lirisley. 









Cardmm pinnulatum Corir. _. 



Clidiophora Gouldiana Dall 





X 



X 



X 

 X 











... 



... 



X 











Cyprina islandiea L. (Arctis islaudica) 

 Cytherea convexa Say — (Callocardia 

















X 

 X 













Ensis arnericana Gould 











... 



X 



--- 



X 











X 







Lyonsia hyalina Conr 





X 

















llacoma bathica L. . . 













X 



--- 



X 



X 



Macoma bathica fusca Sav 











X 













X 

 X 















Macoma species 





















Mactra solidissima Dillwyn (Spisula 

 solidissiina) 













X 





Modiolaria discors L. 



















X 



Modiolus fragm 













X 

 X 











Modiolus modiolus L. . 











X 







X 

 X 



X 



Modiolaria nigra Gray 













Modiolus plicatula Lam. (M. demissus 

 Dillw.) 











X 

 X 

 X 











Mya arenaria L. _ . _ 



X 

 X 



X 



X 



X 



X 

 X 



X 



X 

 X 



X 

 X 



X 



My tilus edulis L 



X 







Pecten magellanicus Gm 









X 

















X 

























X 



X 



--- 



X 



X 



Saxicava arctica L. (S. rugosa) 







X 

 X 









Thyasira obese Ver 





X 

















Venericardia borealis Conr 









X 



... 



--- 



x~ 





Yoldia limatula Say 





X 



X 



X 

 X 

 X 

 X 









Gastropoda. 

 Acmaea testudinalis L 



X 



X 















Aporrhais occidentalis Beck. 















Bela nobilis Moll. 





















Buccimum undatum L. 



Chrysodonrus decemcostatus Say 



Crepidula fornicata L. 



X 



--- 



X 



... 



X 



--- 



X 



... 



X 







X 

 X 

 X 



--- 



X 

 X 



X 

 X 



X 



Crepidula plana Say. 













X 



Crucibulum striatum Say 















Cylincbna alba Brown 





X 



X 















Ilyanassa obsoleta Say 







X 



X 



X 



X 



X 



X 



Lacuna vincta Turton 





X 

 X 



X 



X 

 X 



X 

 X 







Littorina litorea L. . _ . 



X 

 X 



X 



X 

 X 

 X 

 X 

 X 

 X 



X 



--- 



X 



X 

 X 



X 



Littorina palliata Say. 



Lunatia heros Say. 









X 



X 



X 



Melampus lineatus Say 



X 





Thasi lapillys L 



Tritonofusus stimpsoni lirulatus Verr. 



X 



X 



X 



X 

 X 

 X 



... 



X 



... 



X 



X 



X 



... 



X 



X 







X 



X 



Urosalpinx cinereus Say 



X 







