FISHERY BULLETIN: VOL. 71, NO. I 



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,' MMTHA'S ViNETkWD .,« 



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, ipOO METERS 



PHACOIDES BLAKEANSIS 



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PHACOIDES FILOSUS 



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,' MARTHA'S VINEYI 



NANTUCHET , , 



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IPOO METERS 



THYASIRA OVATA 



ipOO METERS 



THYASIRA TRISINUATA 



Figure 9. — Geographic distribution of the common pelecypods. — Continued. 



14 



