PLEISTOCENE FORMATIONS. 



33 



FAITNA. 



The fauna of the upper portion of the San Pedro foj-mation consists of species 

 which are nearly all found li\ing at the present time. One noticeal)le thing 

 regai'ding this fauna is the fact that wherever foiuid it generally contains species 

 which, though living, are found now only south of the locality yielding the fauna; 

 thus indicating somewhat more tropical conditions during the Pleistocene than are 

 prevalent at the present time on the California coast. 



Peett'ii fiiiina. — The Pecten fauna of the upper, or characteristically' Pleistocene, 

 portion of the San Pedro and equivalent formations is as follows: Pecti'n ((hiski-nKix^ 

 P. caurinua, P. clrcularis, and variety neqtdsulcatiis, P. diegensht^ /' (IliiniitiK) 

 glgnntem^ P. hastatus and varieties hericius, hmch-ri, navarchiix, and xtriit^juK, P. 

 Islandlcujf, P. I(itiai(r!tim and varieties cerritenKix^ delosi, fxcicoliiK and monofimefix, 

 P. siihiiddiisux, and /*. rogdesi. 



The following fauna has been found in the upper beds of the San Pedro 

 formation in the vicinity of the t.ype locality, and may be taken as characteristic of 

 the Pleistocene foi' the coast of California: 



List of San Pedro formation (Pleistocene) fossils. 

 [Those marked with an asterisk (*) are known so far at San Pedro only from the lower portion of the San Pedro formation.] 



ANTHOZOA. PKl.ECYPODA — COIltillUed. 



Caryophyllia arnoldi Vaughaii. 

 Caryopliyllia pedroens^is Vauajhan. 

 Paracyathus pedroensis Vautrliaii. 



ECHINOIDEA. 



Echiiiarachnius excentricus Eschseholtz. 

 Strongylocentrotus franciscanus Agassiz. 

 Strongylocentrotus purptiratus Stimpson. 



I'KLECVPODA. 



Aligena cerritensis Arnold. 



Amiantis (.■allcsa Conrad. 



Angulus buttoiii Dull. 



Anomia lainpe Gray. 



Area labiata Sowerby. 



Astarte (Crassinella) braiineri .\rnold. 



* Bornia retifera Dall. 

 Callista newoombiana (iabb. 

 *Callistata snljdiaphana Carpenter. 



Cardita (Carditaniera) saljqnadrata Carpenter. 



( Lazaria id. ) 

 Cardiuin corbis Martyn. 

 Cardinni elatiim Sowerby. 

 Cardiura proceruin Sowerliy. 

 Cardiuni quadrigenarium Conrad. 

 Chama exogyra Conrad. 

 Chania pelluci<la Sowerby. 

 Clidiophora punctata Conrad. 



* Cooperella subdiaphana Carpenter. 



17260— No. 47—06 3 



Corljula luteola Carpenter. 

 Cryjjtomya californica Conrad. 

 Cuniingia californica Conrad. 

 Diplodonta orbella (xould. 

 Diplodonta serricata Reeve. 

 Donax californica Conrad. 

 Donax kevigata Deshayes. 

 Glycymeris barbaren.sis Conrad. 

 Glycymeriji sejitentrionalis Jliddendorf. 

 *Kellia suborbicularis Montague. 

 *Kellia laperousii Deshayes. 

 *Kennerlia bicarinata Carpenter. 

 *Keunerlia tilosa Carpenter. 

 Lai'vicardium substriatuni Ccmrad. 

 *Leda fossa Baird. 

 *Leda hamata Carpenter. 

 *Leda minuta var. prwcursor Arnold. 

 Leda taphria Dall. 

 *LiMia debiscens Conrad. 

 Litliophaga plumula Hanley. 

 Lyonsia californica Conrad. 

 *Maco!na calcarea Gnielin. 

 Maccjma indentata Carpenter. 

 Macoma iuquinata Deshayes. 

 Macoiua nasuta Conrad. 

 Macoma nasuta var. kelseyi Dall. 

 Macoma secta Conrad. 

 Macoma yoldiformis Carpenter. 

 Mactra californica Conrad. 



