INDtX OF SPECIES. 



1( I 



Scalaria 



raricostata, J3, O 260, O 336, 



F447. 

 rt'gularis, 244, O 284, 336, 



S 164. 

 reflexa, O 288, O 336, Q 235. 

 statuuiinata, O 230, O 336. 

 sulicoronata, 99, 146. 

 sul)no<lo3a, 284, 336, S 



165. 

 subulatH, O 216. 

 suprastriata, 260, O 336, P 



446, P 447- 

 tiara, iio, 2S4, O 336, S 164. 

 trar. tincta, 146, 151, 244. 

 Turtonis, 244. 

 venosa, O 230. 

 vulpina, 206, O 336. 

 Scapharca 



bifrous, 24, 154. 

 eiiiarginata, 24. 

 labiata, 24. 

 nux, 24. 

 Schizopyga 



Californiana, 79. 

 Schizothaerus 



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



86, 123, 126, 169. 

 maximus, 123. 

 Scintilla 



Cumingii, 186. 

 Scissurella 



rinuiloides, 34, 258. 

 Scrobicularia 

 alta, 26. 



angulata, Q 230. 

 biangularis, 303. 

 biangulata, 12, O 195, Q, 230, 



V213. 

 Dorabeyi, var. 272. 

 prodacta, 40, 272, 284, O 287, 



O 303, Q 230, S 160. 

 viridotincta, 284, 303, S 160. 

 Scutalus 



proteus, 158. . - . _ 



Xantasi, 158. -^ -«--^ii-=-~ 



Scutellina 



uavicdloides, 3«.i7, »97,0 252, 

 (»3iy, P211. 

 Scurria 



{fviir.) fiinicalata, 98, 136. 

 niitra, 23, 26, 79, 84, 136, 170, 

 173, O 174, O >90, O 199, 

 202, O 20.), O 234, 297, 

 O 319, O 348, P 292, V 222. 

 pallida, 79, O 284. 

 scurra, 170, V 222. 

 Segmentina 



Doabilli, 44- 

 Sella 



assimilata, 5;^, P 445* 

 Semele 



bicolor, 29, 105, O 303. 

 Califoniica, O 287, 



var. 105, 151, 303. 



cornigata, 126. 



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



35«. V213. 

 elliptica, O 303, P 28. 

 flaveacens, 29, 39, 48, 105, 203, 

 245, O 303, o 351. P 28, P 

 548, U 199- 

 flavicans, 48, O 231, 279. 

 incongrua, 97, 126. 

 obliqua, O 284, 303, 

 planata, O 284, O 303, S 160. 

 proxima, 39, 154. 203, O 226, 

 231, 245, O 279, 303, 

 P 548, U 199. 

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



203, O 303. 

 punctata, 304, S 160. 

 rubrolineata, 22, 113, 126, O 

 163, O 232, 303, 351, V 

 212. 

 rnbrotincta, O 284, O 352. 

 rupium, 97, 126, 170, 304, 



O 359- 

 simplex, O 163, O 195, O 232, 



V 212. 

 striosa, 203, 303. ,;, - 

 tortuosa, 303. . _g,3,'^g _ _ 



