ARNOLD — THE PALEONTOLOGY AND STRATIOI! AVHY OF SAN PEDRO. 



27 



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

 were deposited. The same sequence of strata as in the north end of the bhiflf 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 upper 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 scries 

 were collected at the north end of the San Pedro blufl, 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.) 



Amianlix callosa, P 

 Angulus huUoni, P 

 Anomia lampc, P 

 Area lahiala, S 

 Astarte branneri, E 

 Cardium corhis, N 

 Cardium elafum, S 

 Cardium procerum, S 

 Cardium quadriiji'iiarium, 

 Chama e.xorjyra, P 

 Chama pellucida, P 

 Clidiophora punclala, P 

 Corbula hUeola, P 

 Cryptomya californica, P 

 Cuminijia californica, P 

 Diplodonta orhclla, P 

 Diplodonla serricala, S 

 Donax californica, P 

 Donax Imviijala, P 

 Glycyme.ris harbarensis, E 

 Glycyme.rin anptentrionalis, 

 Hinniles (jiijanleua, P 

 Lmvicardinm mbslrialum, 

 Lazaria subquadrata, P 

 Leda taphria, P 

 Lucina acutilineala, P 

 Lucina californica, P 

 Lucina nuUalli, P 

 Lucina tenuisculpta, P 



Ami:ea insmxa, P 

 Aniiea pe.lla, P 

 Amoea Kpcclrum, P 



PELECYPODA. 



Lyonsia californica, P 

 Macoma indenlala, P 

 Macoma inquinala, P 

 Macoma ttaxula, P 

 Macoma var. ki'lscym, S 

 Macoma secla, P 

 Mactra californica, P 

 Maclra caliUiformiK, P 

 Mactra cxol-fa, S 

 Mactra falcata, P 

 Mactra hcmphilli, E 

 Matix alia, P 

 Modiola recta, P 

 Mytilus cdulis, P 

 Nucida suproKtriala, N 

 O.ilrea lurida, P 

 Panopca gi'nerosa, P 

 Pecten dentatiis, S 

 Pecten latiauritun, P 

 Pectin var. frarfilis, E 

 Pecten var. monotimeris, 

 Pecten newsomi, E 

 Pecten subnodosus, S 

 Pecten ventricosus, P 

 Periploma aryentaria, F 

 Petricola cardiloidcs, P 

 Pctrlcola dinticulata, S 

 Pholadidea pnnita, P 



gastropoda. 



Actceon punctoccelala, P 

 Actaeon Iraskii, S 

 Amphiasa corrugala, P 



J'latyodon cancellalus, P 

 Pododesmun macroschinma, 

 Pxammobia cdentnla, ? 

 Pucphin tantiUa, N 

 Sani/tiinolaria nultalli, P 

 Saxidomus aralus, P 

 Semele decisa, P 

 Setnele pulchra, P 

 Siliqua lucida, V 

 Siliqua var. nultalli, N 

 Solen rosaceus, P 

 Soleti sicarius, P 

 Tai/elus californianun, P 

 Tapes lacincata, P 

 Tapes staminea, P 

 Tapes lenerrima, P 

 TelUna boder/ensis, S 

 Tellinn rubescens, S 

 Tivela crassatelloides, P 

 Tresus nultalli, P 

 Venericardia barbarensis, 

 Venus Jluctifraija, P 

 Venus (jnidia, S 

 Venus neglecta, S 

 Venus simillima, P 

 Venus succincia, P 

 Yoldia cooperi, P 

 Zirpluea gabbi, E 



Amphissa versicolor, P 

 Bittium asperum, P 

 Bitlium jtlosum, P 



