28 



TERTIARY AND QUATERNARY PECTENS OF CALIFORNIA. 



List of Piiritiimii formation (lover Pliocene) fossils — CoiitiiiiiciL 



GASTERciPODA — Continued. 



Neverita recluziana Petit (l). 

 Olivella intorta Carpenter (I). 

 Pleurotoma perversa Gabb (I). 

 Pleurotoma s-p. 



Priene oregonensis Redfiekt (/). 

 Purpura crispata Chemnitz (/). 

 Rostellaria indurata Conrad (M). 

 Serpulorbis squamigerus Carpenter (/). 



(i.vsTERiipoDA — continued. 



Sigaretns delnlis Gould (/). 

 Solariella peranialiilis Carpenter [l). 

 Tornatina culcitella (iould [l). 

 Tritonium sp. 

 *Voluta n. sp. (?) A. 



CRUSTACE.\. 



Balanus estrellanus Conrad (^I). 



The San Diego formation in a g'eneral way is the repro.sentative of the 

 Purisima in .southern California, although the former, at least the fossiliferous 

 horizon, may not extend as far baek in the time .scale as the base of the lattxn-. 

 The fauna of the San Diego forniation as developed in the type section at Pacific 

 Beach, north of San Diego, Saii Diego County, is as follows: 



List of San Diego formation fossils. 

 [Those murked with an asterisk (*) are supposed to l)e extinct.] 



ECniSOIDEA. 



Echinarachnius excentricus Eschscholtz. 

 Strongylocentrotu.s ])urpuratus Stinip.«on. 



RHAC'IIIOI'OD.V. 



Laqueus jeffreysi Dall. 



PELECYPOD.V. 



Leda taphria Dall. 



Macoma nasuta Conrad. 



Mactra (Spi.sula) catillifcirmi.s Conrad. 



IMetis alta Conrad. 



Motliolu.s rectus Conrad. 



Ostrea veatchii Gabb. 



Pecten ashle_\'i n. sp. 



Pecten liellilamellatua n. sp. 



Pecten cerrosensis Gabb. 



Pecten cooperi n. sp. 



Pecten hastatus Sowerby. 



Pecten hastatus var. hericius (touIiI. 



PELECYPoDA — Continued. 



Pecten hastatus \ar. ntivarcluis Dall. 

 Pecten healeyi n. sp. 

 Pecten heinphilli Dall. 

 Pecten opuntia Dall. 

 Pecten stearnsii Dall. 

 Phacoides acutilineatus Conrad. 

 Phacoides nuttalli Conrad ( = Lucina id.). 

 Pododesmus niacroschisma Deshayes. 

 Tapes staniinea Conrad. 



GASTEROPODA. 



Crepidula princeps Conrad. 



Dentalium neohexagonuin Sharji and Pilsbry. 



Neverita recluziana Petit. 



Opalia anoniala Stearns. 



Opalia varicostata Stearns. 



Purpura crispata Chemnitz. 



Scala stearnsii Dall. 



Scala tincta Carpenter. 



Turritella cooperi Carpenter. 



MERCED FORMATIOX. 

 TYPE LOCALITY. 



The type locality is the sea cliff south of Lake Merced, San Mateo County, Cal. 



NAME AND DESCRIPTION. 



This formation was named and described by A. C. Lawson, in Bulletin of 

 the Department of Geology, Univer.sity of California, vol. 1, No. 4, 1893, pp. 142 



ct Stq. 



