ARNOLD— THE PALEONTOLOGY AND STKATUiHAl'll V Ol' SAN I'EUKO. 



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Liita taphria 

 Lilhophnijus jilumnla 

 Liirina cafi/orjiica 

 Luciiia nultalli 

 Macoma indentata 

 Macotna inijuinalu 

 Mwoma nasuta 

 Macoma var. Icelseiji 

 Macoma sccta 

 Mactra catilli/ormis 

 Maclra falcala 

 Metis alia 

 Modiola fornicata 

 Modiola recta 

 Nucula suprcwtriata 

 Ostrea lurkia 



Acmaa insessa 

 Acmcea pelta 

 Amphissa corrutjata 

 AmphisHa versicolor 

 Bittium ijuadrijilattim 

 Bittium ruijatum 

 Bulla pimctulata 

 CcEcttm californicum 

 C'lecum crebricinctum 

 Calliostoma canaliculatum 

 Calliostoma costalum 

 Calliostoma gcmmulalum 

 Calliostoma tricolor 

 Cerithidea californica 

 Chlorostoma funebrale 

 Chlorostoma var. subapertum 

 Chlorostoma var. Ugulatum 

 Chorus belcheri 

 Clipidella bimaculata 

 Clipidella callomarginata 

 Columbella gausapata 

 Columbella var. carinata 

 Columbella tuberosa 

 Conus californicus 

 Crepidula adunca 

 Crepidula dorsata 

 Crepidula navicclloides 

 Crepidula onyx 

 Crepidula rvgosa 

 Crucibulum spinosum 

 Drillia cancellata 



Panopea generosa 

 Pecten latinfirilus 

 Pecten var. frayilis 

 Pecten var. }Honotimeri.i 

 Pecten newsomi 

 Pecten ventricosus 

 Periploma argentaria 

 Petricota carditoides 

 Petricola denticulata 

 Pholadidea pcnita 

 Platyodon cancellatus 

 Psephis tantilla 

 Sang uin otaria n u ttalli 

 Saxidomus aratus 

 Semele decisa 



GASTROPODA. 

 Drillia hemphilli 

 Drillia inermis 

 Drillia var. penicillata 

 Drillia, torosa 

 Eulima micans 

 Fissuridca aspera 

 Fissuridea incerjualis 

 ^issuridea murina 

 Fissurclla volcano 

 Fusus luteopictus 

 Hipponyx cranioides 

 Lacuna compacta 

 Lacuna porrecta 

 Leptothyra bacula 

 Littorina scutulata 

 Lucapina crenulata 

 Mangilia angulata 

 Mangilia interlirata 

 Mangilia striosa 

 Margarita var. pcdroana 

 Melampus olivaceus 

 Monoceros engonatum 

 Murex festivus 

 Nassa cali/orniana 

 Nassa cerritensis 

 J^assa fossata 

 Nassa mendica 

 Nassa var. cooperi 

 Nassa perpinguis 

 Nassa tegula 

 Natica leioisii 



CRUSTACEA. 

 Balanus concavus 



SCAPHOPODA. 



'Dentalium hexagonum 



ECHINOIDEA. 

 Echinarachnius excentricus 



Semclc pukhra 

 Siliijua lucida 

 Solin sicarius 

 Tagelus calij'ornianus 

 Tapes lacineata 

 Tapes staminca 

 Tapes tenerrima 

 Tcllina bodegensis 

 Tellina ida: 

 Tivela crassatelloidi's 

 Tresus nultalli 

 I'enus neglecta 

 Venus simillima 

 Venus succincta 

 Zirphcea gabbi 



Neverita recluztajia 

 Ocinebra var. aspera 

 Orinebra var. cerritensis 

 Ocinebra poulsoni 

 Olivella biplicata 

 Olivella inlorta 

 Olivella pedroana 

 Pleurotoma perversa 

 Ranella californica 

 Scala hindsii 

 Scala indianorum 

 Scala tincta 



Serpulorbis sqnamigerus 

 Sigarelus debilis 

 Siphonalia kelletlii 

 Spiroglyphus lituella 

 Taranis slrongi 

 Terebra simplx 

 Tornatina culcitella 

 Trophon cerritensis 

 Turhonilla aurantia 

 Turbonilla crebrijilata 

 TurboniUa laminata 

 Turbonilla lowei 

 Turbonilla similis 

 Turbonilla stearnsii 

 Turbonilla subcuspidala 

 Turhonilla tenuicula 

 Turbonilla tridenta 

 Turritclla coo/>eri 

 Volvaria varia 



This fauna consists of one hundred and sixty species, of which sixty-four are 

 pelecypods, ninety-two are gastropods, one is a scaphopod, one is a crustacean, and 



