24 



CALIFORNIA ACADEMY OF SCIENCES. 



Crepidula adiinca 

 Crepidula grandis 

 Crepidula navicelloides 

 Crepidula onyx 

 Crepidula rwjosa 

 Crucibulum spinoxum 

 CyprtBa spadicea 

 Drillia Tar. penicilkUa 

 Driliia lorosa 

 Bupleura muriciformis 

 Fissuridea aspera 

 Fissuridea incequalis 

 Fissuridea murina 

 Fissurella volcano 

 Fusus barbarensis 

 Fumis lutcopictus 

 Fufius robuslus 

 Haliotis fulcjens 

 Hipponyx cranioidi's 

 Hipponyx lumens 

 Isapis fenestrata 

 Lacuna porrecla 



Ocinebra poulsoni 

 Olivella biplicata 

 OliveUa intorta 

 Olivella pedroana 

 Pisaniafortis 

 Phurotoma carpenteriana 

 Ph'urotoma perversa 

 Prie.ne oreijonensis 

 Purpura crispata 

 Ranella californica 

 Scala crebricoslata 

 Scala hindsii 

 Scala indianorum 

 Scala tincla 



Serpulorbis nquamitjerus 

 Spiroglyphtis liluella 

 Terebra simplex 

 Tornatina culcitella 

 Turriiella cooperi 

 Turrili'lla jeicelli 

 Volvarina varia 



LiUorina scutulata 

 Margarita var. pedroana 

 Marginella jewelti 

 Melampus olivaceus 

 Mitra maura 

 Monoceros engonalum 

 Murex feslimis 

 Murex trialaius 

 I^assa californiana 

 Nassa fossata 

 Nassa mendica 

 Nassa var. cooperi 

 Nassa perpinguis 

 Nassa tegula 

 Natica leioisii 

 Neverila recluziana 

 Norrisia norrisii 

 Ocinebra inierfossa 

 Ocinebra Iceepi 

 Ocinebra var. aspera 

 Ocinebra perita 



CKUSTACEA. 



Balanns concavus 



ECHINOIDEA. 



Echinarachnius excentricus 



SCAPHOPODA. 



Dentalium sfmipolituni Dentalium hexagon uni 



This fauna comprises one hundred and thirty-four species, of which forty- 

 eight are pelecypods, eighty-two are gastropod.s, two are scaphopods, one is a crusta- 

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

 San Pedro series at the north end of the San Pedro bluff, so tlie 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 

 San Pedro terrace. (See I), 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 dips 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 manj' places along the 

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

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

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

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

 it to the I'lioccne. 



'Ncocoiieof tbe Santa Cruz Mouiitalus. By Coo. 11. Ashley. Proc. Cal. Acad. Scl., 2n(l Sor., Vol. V, 1894, p. :t4I. 



