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EXPLANATION OF PLATE 17 

 Figure Page 



106. Abra aequalis (Say) 85 



107. Cumingia tellinoides (Conrad) 85 



108. Cumhig'ia coarotata Sowerby 86 



109. Donax variabilis Say 86 



110. Tagelns plebeius (Solander) 87 



111. Tag'elns divisus (Spengler) 87 



112. Ensis minor Dall 88 



113. Mactra fragilis Gmelin 89 



114. Spisula solidissima siinilis (Say) 89 



115. Mnlinia lateralis corbuloides Deshayes 89 



