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. 



dichotomus, 246. 

 Serpula, 276. 

 Sigaretus, 49, 78, 114. 



scopulosus, 114. 

 SILIQUA, 89, 233. 



Californica, 89. 



Orogonensis, 233. 



patula, 89. 

 SILIQUARIA, 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. 



Solecurtus subteres, 89. 

 Solemya, 89. 



ventricosa, 89. 

 SOLEN, 88, 116, 175, 233. 



cuneatus, 175, 233. 



curtus, 116. 



Diegoeneis, 176, 233. 



maxima, 89. 



patula, 89. 



parallels, 233. 



protexta, 89. 



rosaceus, 88. 

 Solena, 89, 176, 233. 



Diegoensis, 176, 233. 



protexta, 89. 

 Solenoceras, 143. 

 Sphcenia, 90. 



Californica, 90. 

 SPIROCRYPTA, 228. 



pileum, 228. 

 Spondylus, 105. 



Estrellanus, 105. 

 STALAGMIUM, 246. 



concentricum, 246. 

 STANDELLA, 91. 



falcata, 92. 



planulata, 92. 

 Stramcnita, 112. 



petrosa, 112. 

 STRAPAROLLUS, 224. 



lens, 224. 



paucivolvus, 224. 

 Strephona, 75. 



Pedroana, 75. 

 Struthiolaria, 168. 

 SURCULA, b } 47, 72, 150, 217. 



Carpenteriana, 5, 72. 



