99. Pecten pabloensis, Conrad. 



100. Pecten dispalatus, Conrad. 



101. Pecten edgecombensis, Conrad. 



102. Pecten decemnarius, Conrad. 



103. Pecten concentricus, *?«_(/? 



104. Pecten comparilis, Tuomey Sf Holmes. 



105. Pecten Clintonensis, Say. 

 10(i. Pecten biformis, Conrad. 



107. Lyropecten volaeformis, Conrad. 



108. Lyropecten estrellanus, Conrad. 



L.edidae. 



109. Yoldia laevis, (Say) Conrad. 



110. Yoldia eborea, Conrad. 



111. Yoldia impressa, (Conrad) Meek. 



112. Nuculana acuta, Conrad. 



113. Nuculana willamettensis, (Shumqrd) Meek. 



114. Nuculana acutidens, (//. C. Lea) Conrad. 



115. Nuculana carinata, {H. C. Lea) Conrad. 



116. Nuculana concentrica, (Saij) Conrad. 



117. Nuculana penita, ( Conrad) Meek. 



118. Nuculana liciata, Conrad. 



119. Nuculana oregona, (Shumard) Meek. 



120. Neilo abrupta, (Conrad) Meek. 



Xuciilidae. 



121. Nucula cuneiformis, Conrad. 



122. Nucula dolabella, //. C. Lea. 



123. Nucula decisa, Conrad. 



124. Nucula diaphana, //. C. Lea. 



125. Nucula proxima, Say? 



12(j. Nucula obliqua, Say (not Lamk.). 



127. Nucula Conradi, Meek. 



Arcidae. 



128. Axineea arata, Conrad. 



129. Axinaea barbarensis, Conrad. 



130. Axinaea carolinensis, Conrad. 



131. Axinaea laevis, (Tuonuy i^ Holmes) Conrad. 



132. Axinaea lentiformis, Conrad. 



133. Axinaea passa, Conrad. 



134. Axinaea parilis, Conrad. 



135. Axinaea quinquerugata, Conrad. 



136. Axinaea tricenaria, Conrad. 



137. Axinaea transversa, (Tuomey ^- Holmes) Conrad. 



138. Axinaea subovata, (Say) Conrad. 



