vy i 
u es 1 : ae (6 ee } 
74 A 
21:1251 Scurria mitra Esch. is Acmaea m. 
21:1252 Semele californica Ad. 
Rare in Southern Cal, fide Keep. 
21:1253 Semele incongrua Cpr. Cal. (fide Keep). 
21:1254 Semele pulchra montereyi Arnold. 
Monterey, Cal., living; San Pedro, Cal. (Pleistocene). 
21:1255 Serpulorbis squamigerus Cpr. is Aletes s. 
21:1256 Siliqua californica Conr. is patula var. nuttallii. 
21:1257 Siliqua nuttallii Conr. is patula n. 
21:1258 Siliquaria edentula Gabb, is Psammobia e. 
21:1259 Siphonaria peltoides is Williamia p. 
21:1260 Siphonium lituella Morch, is Spiroglyphis 1. 
21:1261 Solecurtas californianus Conr. is Tagelus c. 
21:1262 Solecurtus lucida Conr. is Siliqua 1. 
21:1263 Solecurtus nuttalli Conr. is Siliqua patula n. 
21:1264 Solecurtus radiata L. is Siliqua lucida. 
21:1265 Sphaenia californica Conr. is Cryptomya c. 
21:1266 Sphairella tumida Conr. is Diplodonta orbella. 
21:1267 Genus Spiroglyphis Daudin. 
Animal forming a groove on surface of shells, stones, etc., 
covering it over with shelly matter, forming a tubular case, 
21:1268 Spiroglyphis lituela Morch. 
Diam. 1.5 mm, irregular and sometimes openly spiral, rather 
compressed; color dingy white; surface sculptured by approxima- 
tely regular incremental lirulae and arcuate striae. Frequently 
covers both surfaces of seaweeds with its tiny shells, but equally 
common on shells and stones, San Diego, Cal., to Magdalena bay, 
Baja, Cal. 
1269 Spisula alaskana Dall. Alaska. 
1270 Standella, see Mactra. 
1271 Strephona pedroana Conr. is Olivella p. 
1272 Styliferina acicula Stimp. 
1273 Styliferina tenuisculpta Cpr. 
1274 Surcula H. & A. Ad. is subg. Pleurotoma. 
(Bathytoma, Cryptoconus now). 
Tapes, see Paphia. 
Tapes diversum Conr. is P. staminea. 
7 nes gracilis Gld. is Saxidomus aratus. 
< Jes lineatum Conr. is P. staminea. 
a | 
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1276 
1277 
1278 
1279 
1280 
1281 
1282 
1283 
1284 
1285 
1286 
1287 
1288 
1289 
1290 
1291 
1292 
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1294 
1295 
Tellina 
Tellina 
Tellina 
Tellina 
Tellina 
Tellina 
Tellina 
Tellina 
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Tellina 
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Tellina 
alta Gmel. is Metis alta. 
calcarea, Gmel. is Macoma c. 
emacerata Conr. is bodegensis. 
inquinata Desh. is Macoma i. 
lata Gmel, is Macoma calcarea. 
ligamentina Desh. igs Macoma secta. 
nasuta Conr. is Macoma n. 
obtusus Cpr. non Sby. is buttoni. 
pedroana Conr. is buttoni and Macoma calcarea. 
proxima Sby. is Macoma calcarea. 
secta Conr. is Macoma s. 
sordida Couthouy, is Macoma calcarea. 
subulosa Spengler, is Macoma calcarea. 
Terebra variegata Gray, is simplex. 
Terebratalia smithi Arnold, 1903. 
Pedro, Cal. (Pliocene). 
Thracia plicata, is undulata Conr. 
Tivela crassatelloides Conr. is stultorum. 
