INDEX OF GENERA AND SPECIES. 



295 



Scrobicularia, 92. 



viridotincta, 92. 

 Scurria, 87. 



mitra, 87. 

 Scutella, 37, 109. 



Gibbsii, 37, 109. 



interlineata, 110. 



striatula, 110. 

 Semele, 94. 



decisa, 94. 



pulchra, 94. 

 Semicassis, 113. 



biliratus, 113. 



petrosus, 113. 

 Semitubigera, 109. 



tuba, 109. 

 Septifer, 101, 246. 



bifurcatus, 101. 



dicbotomus, 24G. 

 Serpula, 276. 

 Sigaretus, 49, 78, 114. 



scopulosus, 114. 

 Siliqua, 89, 233: 



Californica, 89. 



Oregonensis, 233. 



patula, 89. 



SlLIQUARIA, 53, 89. 



edentula, 53, 89. 

 Sinum, 49, 78, 114. 



planicostum, 49, 78. 

 scopulosum, 114. 



SlPHONELLA, 108. 



multipora, 108. 

 Smilotrochus, 205, 253. 

 curtus, 205, 253. 



SOLECURTUS, 89. 



Nuttallii, 89. 



Solccurtus subteres, 89. 

 Solemya, 89. 



ventricosa, 89. 

 Solen, 88, 116, 175, 233. 



cuneatus, 175, 233. 



curtus, 116. 



Diegoensis, 176, 233. 



maxima, 89. 



patula, 89. 



parallelus, 233. 



protexta, 89. 



rosaceus, 88. 

 Solena, 89, 176, 233. 



Diegoensis, 176, 233. 



protexta, 89. 

 Solenoceras, 143. 

 Sphoenia, 90. 



Californica, 90. 

 Spirocrypta, 228. 



pileum, 228. 

 Spondylus, 105. 



Estrellanus, 105. 

 Stalagmium, 246. 



concentricum, 246. 

 Standella, 91. 



faleata, 92. 



planulata, 92. 

 Stramonita, 112. 



petrosa, 112. 

 Straparollus, 224. 



lens, 224. 



paucivolvus, 224. 

 Strephona, 75. 



Pedroana, 75. 

 Struthiolaria, 168. 

 Surcula, 5, 47, 72, 150, 217. 



Carpcnteriana, 5, 72. 



