ARNOLD — THE PALEONTOLOGY AND STRATIGKAPHY OF SAN PEDKO. 



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Leila taphria 

 LithophfKjiis jilumula 

 Lucina califoniica 

 Lucina nuttalli 

 Macoma indeniata 

 Macoma inquinnta 

 Mricoma nnsuta 

 Macoma vai". kelsryi 

 Macoma secla 

 Mactra calilliformis 

 Mactra falcala 

 Metis alia 

 Modiola fornicaia 

 Modiola recta 

 Nucula supra.itriata 

 Oslrea lurida 



AcnKJ^a insessa 

 Acmaa pelta 

 Amphissa corrugata 

 Amphissa versicolor 

 Bittium ijuadrifilatum 

 Bittium rugatum 

 Bulla punclidata 

 Coecum californicum 

 Ccecum crebricinclum 

 Calliostoma caiialiculatum 

 Calliosloma coslaiuvi 

 Calliostoma gemmulatuni 

 Calliosloma tricolor 

 Cerithidea californica 

 Chlorostoma funebrale 

 Chlorosloma var. subaperlum 

 Chlorostoma var. ligulatum 

 Chorus belcheri 

 Clipidella bimaculata 

 Clipidella callomarginata 

 Coliimbella gausapata 

 Columbella var. carinata 

 Columbella luberosa 

 Conns californicus 

 Crepidula adunca 

 Crepidula dorsata 

 Crepidula navicelloides 

 Crepidula onyx 

 Crepidula rugosa 

 Crucibulum spinosum 

 Drillia cancellata 



Panopea generosa 

 Pccten latiauriius 

 Pecten var. fragilis 

 Peclen var. monotimeris 

 Pecten neicsomi 

 Peclen ventricosus 

 Periploma argeniaria 

 Petricola cardiioides 

 Petricola denticulata 

 Pholadidea penita 

 Platijodon cancellatus 

 Psephis tantilla 

 Sanguinolaria nullnlli 

 Saxidomus aratus * 



Semele decisa 



GASTROPODA. 



Drillia hemphilli 

 Drillia inermis 

 Drillia var. ptnicillata 

 Drillia torosa 

 Eulima micans 

 Pissitridea aspcra 

 Fissuridea iiuBqualis 

 Fissuridea murina 

 Fissurella volcano 

 Fusus luteopictus 

 Hipponyx cranioides 

 Lacuna compacta 

 Lacuna porrecta 

 Leplothyra bacula 

 Lillorina scutulata 

 Lucapina crenulata 

 MangiUa angulata 

 Mangilia interlirata 

 MangiUa striosa 

 Margarita var. pedroana 

 Melampus olivaceus 

 Monoceros engonatum 

 Murex festivus 

 Nassa cali/orniana 

 N^assa cerritensis 

 Nassa fossata 

 Nassa mendica 

 Nassa var. cooperi 

 Nassa perpinguis 

 Nassa tegula 

 Natica lewisii 



CRUSTACEA. 



Balanus concavus 



SCAPHOPODA. 

 Dentalium hexagonum 



ECHINOIDEA. 



Echinarachnius exccnlricus 



Semele pulchra 

 Silit/ua liicida 

 Solen sicarius 

 Tagelus californianus 

 Tapes lacineata 

 Tapes ataminea 

 Tapes tenerrima 

 Tt'llina bodegensis 

 Tellina idfi 

 Tivela crassatelloid's 

 Tresus nuttalli 

 Venus neglecta 

 Venus simillima 

 Venus succincta 

 Zirpihcea gabhi 



Neverita recluziana 

 Ocinebra var. aspera 

 Ocinebra var. cerritensis 

 Ocinebra poulsoni 

 Olivella biplicata 

 Olivella intorta 

 Olivella pedroana 

 Pleuroloma pierversa 

 Ranella californica 

 Scala hindsii 

 Scala indianorum 

 Scala tincta 



Serpulorbis squamigerus 

 Sigaretus debilis 

 Siphonalia kellettii 

 Spiroglyphus litttella 

 Taranis slrongi 

 Terebra simplex 

 Tornatina culcitella 

 Trophon cerritensis 

 Turbonilla aurantia 

 Turbonilla crebrifilata 

 Turbonilla laminata 

 Turbonilla lowei 

 Turbonilla similis 

 Turbonilla stcarnsii 

 Turbonilla subcuspidata 

 Turbonilla ienuicnla 

 Turbonilla tridenta 

 Turritella cooperi 

 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 



