Crfpiduin aduHCn 

 f'rrpijula grnndis 

 Crtpidula navietlloidrit 

 Crtpidula onyar 

 Crrpiduln ru>jo»» 

 Crucibutum fpinofuin 

 Cj/pr*rti spudicfii 

 lirillia var. pfiiicidnln 

 Drillia lorotn 

 Kuplrura muriciformin 

 yiMuridm rm/tfrti 

 /7.«urirf>"ii inai/unliii 

 f'luurid^a murina 

 Fivurfltn votenno 

 t'ufUf bitrhnrtnxiii 

 Fufut luteopic(ui> 

 FufUM robuntun 

 fifiliotU fuhjfna 

 fUpponyx crnnioidi'^ 

 tfippouj/x tuinrim 

 infipU j'fnfBtrntn 

 I.ncuna porrtela 



Oeinrbra poitlnoiii 

 Olivlla biplictUn 

 Otivrlta intorta 

 Itlivella pcdroana 

 I'iaania forth 

 I'Uitroloma carpenUriaiia 

 Phuroloma pervrrna 

 Prit'ne oritjotifnuiii 

 I'urpura crinpaln 

 Itatirlta cali/ornicn 

 Sciiln crvbricoHnta 

 Scnlfi hhidsii 

 Scnin itididnorum 

 Scnia linctn 



Scrpulorbia aquarnhjerut 

 Spiroijli/phus liluclla 

 Tetebra simplex 

 Tornttlinn culcitelln 

 Turriti'.Un rooperi 

 TurrilHla jiwelli 

 Voivarina vftria 



C'ALIFOHNIA ArADKMV OK SCIENCES. 



Litlorinn leulultitn 

 Miir<iiiritii var. prdroann 

 Murijinrtttt jtwftti 

 Mrtnmpun oiivnctun 

 Milra mnurtt 

 MoHoerroK rnijonntum 

 Mum fnlivun 

 MurfX triitUttuit 

 StiMfi cnU/orninnn 

 SaimnfoMiiln 

 Siumn tifiidirii 

 Xiiiuii vnr. coop'-ri 

 y<u»n prrpinijuia 

 SoMa teijuta 

 yaticn ItwiHii 

 NrverUa recluziniia 

 Norr'uia norr'mi 

 Oeinrbra intf.rfosaa 

 Oeinrbra keepi 

 Ocincbra var. anpern 

 Oeinrbra prrila 



CRUSTACEA. 

 lialanuK concavus 



ECHINOIDEA. 

 Hchinarachniua exccnlricuH 



SCAPHOPODA. 

 iJiHlnliiim srmipolitum Dtnlalium hexaijonum 



This fauna coraprise.s one luindred and thirty-four sjiecies, of which forty- 

 eiglit are pelccypods, eighty-two are j^astropods. two are scaphopods, one i.s a crusta- 

 cean, and one is an echinoderm. Thi.s fauna is not as large as that of the upper 

 San Pedro series at the north end of the San Pedro blufT, so the discussion of the 

 fauna will follow the list of species obtained from the latter locality. 



There is a railroad cut a few feet in depth near the southwestern limit of the 

 Sau Pedro terrace. (See 7>, diagram E, PI. XXIII.) On both sides of this cut 

 there is exposed a bed of gravel consisting of sand, numerous well preserved fossils, 

 and water-worn pebbles of Miocene shale, many of which are full of pholas holes. 

 The bed is from two to three feet thick, and rests unconformably on the upturned 

 edges of the Miocene shale, which at this point dips northeast at an angle of about 

 15°. The gravel stratum dij)s gently toward the .south, and is overlain by soil, which 

 varies from three to five feet in thickness, growing thicker toward the south. This 

 layer is also exposed at the top of the sea-cliff near I), and at many places along the 

 top of the cliff from D to Timm's Point. This formation is exceptionally well de- 

 veloped on the sides of the ravine which cuts the bluff at Crawfish (Jeorge's, showing 

 a thickness of three feet, very fossiliferous, and, in some places, hardened by calcare- 

 ous cement. The deposit at Crawfish George's is mentioned by Ashley,' who refers 

 it to the Pliocene. 



■Neoceoeor ttaea*0MCnu .MonnUlna. iij ato. U. Aahlry. Froc. Cal. Acad. Sci., 2nd Ser., Vol. V, ISM, p. :<41. 



