AKNOLD — THE PAI.EONTOLOdY AND STRATIGliArilY OF SAN I'EDKO. 



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Leda taphria 

 Lithophagus plumnla 

 Lucina californka 

 Litcina nuitalli 

 Mncoma indentuta 

 Maroma inquinata 

 Maeoma nnsuta 

 Macoma var. kelscyi 

 Maeoma secla 

 Mnctra calilliformis 

 Maclra falcala 

 Afetiti alia 

 Modiola fornicala 

 Modiola recla 

 Nucula su/irnjitriala 

 Oatrea lurida 



Acnuva insexsa 

 Acmcea pelta 

 Amphissa corrui/ata 

 A mphissa versicolor 

 BHlium (luadrifilatum 

 Biltinm ruijaliim 

 liulln pnnciulata 

 CiKcum californirum 

 C(B<"iim crebricincLuni 

 CalUostoma canalknlahim 

 Calliosloma costatum 

 CalUostoma cjemmulatum 

 Calliosloma tricolor 

 Cerilhidea californica 

 Chlorostoma funebrale 

 Chlorosloma var. subapertnm 

 Chlorostoma var. liijttlatum 

 Chorus belcheri 

 Clipidella himacidata 

 Clipidella callomarginata 

 Colambella gausapata 

 Columhella var. carinala 

 Columbella tuberosa 

 Conns californicus 

 Crepidula adunca 

 Crepidula dorsata 

 Crepidula navicelloides 

 Crepidula onyx 

 Crepidula rugosa 

 Crucibulum spinosutn 

 DrilUa cancellata 



Panopea generosa 

 Pecten laliaurilus 

 Pecten var. fragilis 

 Pecten var. monotimeris 

 Pecten ncwsomi 

 Pecten ventricosus 

 Pcriploma argentaria 

 Petrieola earditoides 

 Petricola de.nticulala 

 Pholadidea penita 

 , Plalyodon cancellatus 

 Psepkis tantilla 

 Sanguinolaria nuitalli 

 Saxidomus aratus 

 Scmelc decisa 



GASTROPODA. 



JJrillia hemphilli 

 Drillia inermis 

 Drillia var. penicillata 

 JJrillia lorosa 

 Eulima micaiis 

 Fissuridea aspera 

 Fissnridea imegnalis 

 Fissuridea murina 

 Fissurella volcano 

 Fusus luteopictus 

 Hipponyx cranioide.s 

 Lacuna compacta 

 Lacuna porrecla 

 Leptothyra bacula 

 Littorina scutulata 

 Lucapina crenulata 

 Mangilia angulata 

 Mnngilia interlirata 

 Mangilia striosa 

 Margarita var. pedroana 

 Melampus olivaceus 

 Monoceros engonatum 

 Murex festivus 

 ^assa calij'orniana 

 Nussa cerritcnsis 

 Nnxsa fossata 

 Nassa mendica 

 Nassa var. cooperi 

 Nassa perpinguis 

 Nassa te.gula 

 Natica lewisii 



CRUSTACEA. 

 Balanua concavus 



SCAPHOPODA. 

 Dentaliitm hexagonum 



ECHINOIDEA. 

 Echinarachnius exceniricus 



Semele pulchra 

 Siliqua lucida 

 iSolcn sicarius 

 Tagelus californianus 

 Tapes lacineata 

 Tapes staminea 

 Tapes tenerrima 

 Tcllina bodegenais 

 Tellina idai 

 Tivela crassatelloides 

 Tresus nuttalli 

 Venus neglecta 

 Venus simillima 

 Venus succincta 

 Zirphtea gabbi 



Neverita rechiziana 

 Ocine.bra var. aspera 

 Ocinebra var. cerritcnsis 

 Ocinebra poulsoni 

 Olivella biplicata 

 Olivella intorta 

 Olivella pedroana 

 Pleurotoma perversa 

 Ranella californica 

 Scala hindsii 

 Scala indianorum 

 Scala tincta 



Serpulorbis squamigerus 

 Sigaretus debilis 

 Siphonalia kellettii 

 Spirogtyphus lituella 

 Taranis strougi 

 Terebra simplex 

 Tornatina culcitella 

 Trophon cerritcnsis 

 Turbotiilla aurantia 

 Tnrbonilla crebrifilata 

 Turbonilla laminala 

 Tnrbonilla louvi 

 Turbonilla similis 

 Turbonilla steartisii 

 Turbonilla subcuspidata 

 Turbonilla tenuicnla 

 Turbonilla iridenta 

 Turritella cooperi 

 Valvar ia varia 



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

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



