ARNOLD — THE PALEONTOLOGY AND STRATIGRAPHY OF SAN PEDRO. 



27 



depression during the beginning of the epoch in which the upper San Pedro beds 

 were deposited. The same sequence of strata as in the north end of the bluff occurs 

 across the little valley to the west. The strata extend toward the west, but just how 

 far it is not possible to determine. All the fossils labeled "San Pedro" and "Lum- 

 ber yard " are from the upper San Pedro strata in this locality, and many fine 

 specimens have been obtained during the past few years. A great many shiploads of 

 material have been hauled away from the bluffs as ballast by the coaling vessels 

 docked at the port of San Pedro. 



The uppermost gravel stratum of the ujiper San Pedro series appears to be 

 laid down nearly horizontally and almost continuously over the whole of the lower 

 or fifty-foot terrace of San Pedro Hill. 



The following species from the type locality of the upper San Pedro series 

 were collected at the north end of the San Pedro bluff, near the lumber yard, one- 

 half mile north of the valley: 



List of Fossils from the North End of the San Pedro Bluff. 



(P indicates species found living at San Pedro; N indicates species found living only north of San Pedro; 

 S indicates species found living only south of San Pedro; E indicates extinct species or those not known as living.) 



Amianlts callosa, P 

 Anijulus hiUloni, P 

 Anomia lampn, P 

 Area labiata, S 

 Asiarte branneri, E 

 Cardium corbis, N 

 Gardium elalum, S 

 Cardium proccrum, S 

 Cardium quadriiicnaritim, 

 Chama exoijyra, P 

 Chama pfllucida, P 

 CUdiophora punctata, P 

 Corbula luteola, P 

 Cryptomya californica, P 

 Cuminriia californica, P 

 Diplodonta orbf.lla, P 

 Diplodonta serricala, S 

 Donax californica, P 

 Donax Irevir/ata, P 

 Glycymi'ris barbarensis, E 

 Olycymeris septcntrionalis, 

 Hinnitcs giganteus, P 

 Lcevicardium subslriatum, 

 Lazaria subqnadrala, P 

 Leda taphria, P 

 Lucina acutilineata, P 

 Lucina californica, P 

 Lucina nuttalli, P 

 Lucina tcnutsculpta, P 



Aincta insessa, P 

 Am,CBa pelta, P 

 Amtca spectrum, P 



PELECYPODA. 



Lyoiisia californica, P 

 Macoma indentata, P 

 Macoma inquinata, P 

 Macoma naxuta, P 

 Macoma var. kelscysi, S 

 Macoma secla, P 

 Maclra californica, P 

 Mactra catilliformis, P 

 Mactra exolrta, S 

 Mactra falcala, P 

 Mactra hemphilli, E 

 Metis aha, P 

 Modiola recta, P 

 Mytilus edulis, P 

 Nucula supraxtriata, N 

 Ostrea lurida, P 

 Panopea gcnerosa, P 

 Pecten dentatus, S 

 Pecten latiauritus, P 

 Pecten var. fragiliK, E 

 Pecten var. monotimeris, 

 Pecten newsomi, E 

 Pecten stibnodosvs, S 

 Pecten ventricosus, P 

 Periploma argentaria, P 

 Petricola carditoidea, P 

 Petricola denliculata, S 

 Pholadidea penila, P 



GASTROPODA. 



Actai07i punctoccelata, P 

 Actce07> trankii, S 

 Amphissa corrugata, P 



Platyodon cancellatus, P 

 Pododesmufi macroschisma, 

 Psammobia cdentula, ? 

 Psephis tantilla, N 

 Sanguinolaria nuttalli, P 

 Saxidomus arat-us, P 

 Semele decisa, P 

 Se.mele pulchra, P 

 Siliqua lucida, P 

 Siliqua var. nuttalli, N 

 Solen roKaceus, P 

 Solen sicarius, P 

 Tagelua californianu.% P 

 Tapes lactneata, P 

 Tapes siaminea, P 

 Tapes lenerrima, P 

 Tellina bodegensis, S 

 Tellina rubescens, S 

 Tivela crassatelloides, P 

 Tresus nuttalli, P 

 Venericardia barbarensis, 

 Venus fiuctifraga, P 

 Venus gnidia, S 

 Venus neglecta, S 

 Venus simillima, P 

 Venus succincta, P 

 Yoldia cooperi, P 

 Zirphcea gabbi, E 



Amphissa versicolor, P 

 Bittiuni asperum, P 

 Bittinm /ilosum, P 



