DALL: MOLLUSCA AND BRACHIOPODA. 
Protocardia, 474, 415. 
panamensis, 415. 
Psammacoma, 421. 
Psammotreta, 422. 
Pseudamusium, 402, 403, 404, 405. 
Pseudaxinea, 399. 
Pseudotoma, 256. 
Pthonia, 366. 
Ptychatractus, 299. 
californicus, 299. 
ligatus, 300. 
occidentalis, 300. 
Puncturella, 352, 353. 
asturiana, 353. 
expansa, 353. 
Purpura, 306, 312. (See Thais.) 
Pyrula anomala, 300. 
RADULA PYGMAFA, 408. 
Rhabdus, 359. 
Rheda, 230. 
Rictaxis, 236. 
Rimula expansa, 353. 
Rochfortia, 413. 
mabillei, 413. 
rochebrunet, 414. 
Rouaultia, 258. 
Ryderia, 431. 
SaBaTIA, 240. 
Sabatina, 240, 241. 
Sanguinolaria rosea, 379. 
Saxicava, 424. 
antarctica, 424. 
arctica, 424. 
chilensis, 424. 
frigida, 424. 
lebruni, 424. 
mollis, 424. 
rugosa, 424. 
Scala, 315, 317. 
Jerminiana, 315. 
mitchelli, 317. 
Scaphander, 238, 239, 240, 241. 
cylindrellus, 239, 240. 
decapitatus, 240. 
gracilis, 239. 
interruptus, 239. 
lignarius, 241. 
planeticus, 241. 
Scapharca, 397. 
Scaphella, 297, 298. 
benthalis, 298. 
Seguenzia, 325, 326. 
monocingulata, 326. 
occidentalis, 325. 
stephanica, 325. 
Sigaretopsis, 334. 
Silenia sarsii, 480. 
Silia, 319. 
Silicula, 397, 392. 
fragilis, 391. 
Solariella, 349, 351, 352. 
ceratophora, 350. 
equatorialis, 351. 
galapagana, 350. 
nuda, 349. 
Solarium, 327. 
Solemya, 361, 368, 364, 365, 366. 
agassizii, 364, 365, 366. 
australis, 361, 362, 363, 364. 
borealis, 363, 364. 
grandis, 364. 
japonica, 364. 
johnsoni, 364, 365. 
485 
macrodactyla, 363, 364, 365, 366. 
mediterranea, 362, 363, 364. 
occidentalis, 364. 
panamenstis, 363, 364, 366. 
parkinsoni, 362, 363, 364. 
patagonica, 363, 364. 
protexta, 364. 
pusilla, 364. 
radiata, 366. 
solen, 362, 363, 364 
valvulus, 364, 366. 
velum, 363, 364. 
ventricosa, 364. 
Solenella, 383. 
norrisii, 383. 
Solenosteira, 300. 
anomala, 300. 
elegans, 300. 
Solidula, 236. 
Spaniodon, 412. 
Speo bifasciatus, 236. 
Sphenia subequalis, 422. 
Spineoterebra, 246, 247, 248, 250. 
Spinula, 377. 
Steiraxis, 257, 273. 
aulaca, 273. 
Sthenorhytis stearnsii, 317. 
Stigmaulax, 332. 
Stilifer, 377, 318. 
bathymetrae, 318. 
thomasiae, 318. 
Strioterebrum, 246, 248, 250, 251, 252, 253. 
Strombina, 310. 
edentula, 310. 
turrita, 310. 
Subula, 245, 249. 
Surcula, 256, 261, 262, 263, 264, 272. 
Surculina, 260, 291, 292. 
blanda, 261. 
Surgula, 256. 
