INDEX OF SPECIES. 



101 



Scalaria 



raricostata, 33, 260, 336, 



P447. 



regularis, 244, 284, 336, 

 S 164. 



reflexa, 288, 336, Q 235. 



statuminata, 230, 336. 



subcoronata, 99, 146. 



subnodosa, 284, 336, S 

 165. 



subulata, 216. 



suprastriata, 260, 336, P 

 446, P 447. 



tiara, no, 284, 336, S 164. 



?var. tincta, 146, 151, 244. 



Turtonis, 244. 



venosa, 230. 



vulpina, 206, 336. 

 Scapharca 



bifrons, 24, 154. 



emarginata, 24. 



labiata, 24. 



DUX, 24. i 

 Schizopyga 



Calit'orniana, 79. 

 Schizothaerus 



Nuttallii, 22, 25, 26, 69, 72, 76, 

 86, 123, 126, 169. 



maximus, 123. 

 Scintilla 



Cumingii, 186. 

 Scissurella 



rimuloiiles, 34, 258. 

 Scrobicularia 



alta, 26. 



angulata, Q 230. 



biangularis, 303. 



biaugulata, 12, 195, Q 230, 

 V213. 



Donibeyi, var. 272. 



producta, 40, 272, 284, 287, 

 o 303, Q 230, S 160. 



viridotincta, 284, 303, S 160. 

 Scutalus 



proteus, 158. 



Xantusi, 158. 



Scutellina 



luivicelloides, 31,37, I97,0 252, 



319, P 211. 

 Scurria 



{?vui-.) fuuiculata, 98, 136. 

 mltra, 23, 26, 79, 84, 136, 170, 



173, 174, 190, 199, 



O 202, O 209, 234, 297, 



319, 348, P 292, V 222. 

 pallida, 79, O 284. 

 scurra, 170, V 222. 

 Segmentina 



Doubilli, 44. 

 Sella 



assimilata, 33, P 445« 

 Semele 



bicolor, 29, 105, 303. 

 Californica, 287. 



imr. 105, 151, 303. 



corrngata, 126. 



decisa, 22, 26, 126, 231, 303, 



351. V 213. 

 elliptica, 303, P 28. 

 flavescens, 29, 39, 48, 105, 203, 



245,0 303,0 351, P 28, P 

 • 548, U 199. 

 flavicans, 48, 231, 279. 

 incongrua, 97, 126. 

 obliqua, 284, 303. 

 planata, 284, 303, S 160. 

 proxima, 39, 154, 203, 226, 



231, O 245, O 279, 303, 



P 548, U 199. 

 pulchra, 23, 39, 78, 97, 126, 154, 



203, 303. 

 punctata, 304, S 160. 

 rubrolineata, 22, 113, 126, O 



163, 232, 303, 351, V 



212. 

 rubrotincta, 284, 352. 

 rupiam, 97, 126, 170, 304, 



359- 

 simplex, 163, 195, 232, 



V 212, 

 striosa, 203, 303. 

 tortuosa, 303. 



