Index 



Spiroglyphus ( ?) tejonensis, figure of, 

 opp. 506. 



Spisula, first genus of Mactrinae to 

 appear in Pacific Coast region, 

 276; descriptions of, 283. 



abscissa, 274; descriptions of, 289; 

 figures of, 336, 338. 



acutirostrata, 274; description of, 

 295; figures of, 295; differentia- 

 tion from S. merriami, 296. 



alaskana, 265, 284. 



alaskensis, 283. 



albaria, 274, 275, 292; description 

 of, 290; confused with S. planu- 

 lata, 291; differentiation from S. 

 selbyensis, 293; figures of, 338, 

 340. 



ramonensis, 274, 291; description 

 of, 291; figures of, 336, 340. 



ashburnerii, 268, 273; graph of, 

 269; differentiation from S. mer- 

 riami, 294; description of, 298; 

 confused with S. gabbiana, 299; 

 figures of, 342, 344. 



brevirostrata, 275; description of, 

 296; figures of, 346. 



calistaeformis, 265, 274; descrip- 

 tion of, 301. 



catillif ormis, 268, 274, 275, 284; 

 graph of, 269; descriptions of, 

 285; figures of, 324, 326, 328; 

 confused with Mactra califor- 

 nica, 280; with S. hemphillii, 

 288, with S. occidental, 289; 

 differentiation from S. merce- 

 densis, 287. 



alcatrazensis, 265, 285. 



ehicoensis, 273; description of, 

 300; figures of, 344. 



coalingensis, 275; description of, 

 301 ; comparison with S. breviro- 

 strata, S. falcata, and S. alba- 

 ria, 302; figures of, 344. 



dolabriformis, 264. 



faleata, 275; confused with Mac- 

 tra dolabriformis, 279; resem- 

 blance to Mactra, californica 

 280; hinges of, compared with 

 those of 8. planulata, 294; de- 

 scription of, 297; differentiation 

 from S. planulata, 298; figures 

 of, 342. 



gabbiana, 273, 298 note 24; con- 

 fused with S. ashburnerii, 299; 

 description of, 299; figures of, 

 344. 



hemphilli, 275; descriptions of, 

 287; confused with S. catilli- 

 f ormis, 288; figures of, 332, 334. 



lenticularis, 274; description of, 

 302. 



mercedensis, 275; description of, 

 286; differentiation from S. 



catillif ormis, 287; figures of, 

 330. 



merriami, 268, 274, 485; descrip- 

 tion of, 294; differentiation from 

 S. tejonensis, 303; figures of, 

 344, opp. 510. 



montereyana, 274. 



occidentalis, 274; description of, 

 288; confused with S. eatilli- 

 f ormis, 289; figures of, 336. 



planulata, 275; confused with 8. 

 albaria, 291 ; description of, 293 ; 

 hinges of, compared with those 

 of S. falcata, 294; figures of, 

 322. 



polynyma, 283. 



var. alaskana, 283. 



precursor, 265, 290, 291. 



selbyensis, 268, 270, 274; graph of, 

 269; description of, 292 ; differ- 

 entiation from S. albaria, 293; 

 figures of, 342. 



sisquocensis, 265; description of, 

 302; associated with S. catilli- 

 formis var. alcatrazensis, 303. 



solidissima, figures of, 316. 



tejonensis, 274; description of, 

 303; figure of, 344. 



truncata, description of, 300. 



voyi, 275; descriptions of, 283; 

 figures of, 316, 318, 320. 



weaveri, 274; description of, 313; 

 figure of, 344. 

 Standella California, 285. 



falcata, 296; description of, 297. 



planulata, description of, 290. 

 Stanton, T. W., acknowledgment to, 

 138; cited, 151, 152, 156, 157, 

 369, 384. 



Stephanophvllia californica, 66; fig- 

 ures of, opp. 70. 



Stepovak series, Alaska, mactrine 

 species from, 274. 



Stewart, R., 164. 



Stewart Valley, Nevada, 163. 



Stratigraphy and Fauna of the 

 Tejon Eocene of California, 363. 



Strepsidura howardii, 498; figure of, 

 opp. 506. 



Studley, C. K., cited, 153. 



Suman, John R., 50. 



Sumner, T. B., et al., cited, 143 note 

 12. 



Surcula elarki, 499; figures of, opp. 

 514. 



gesteri, 499; figure of, opp. 516. 

 supraplanis, figure of, opp. 506. 

 Sutter formation at Marysville 



Buttes, description of, 404. 

 Svmmorphomactra, descriptions of, 

 297. 



Table Mountain, near Oroville, Cali- 

 fornia, geological map of, 393. 



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