30 



TERTIARY AND QUATERNARY PECTENS OF CALIFORNIA. 



IJst uf Merced forniulion (upper I'lioeeiie) fosxils." 



[Those unmiirked have been reported from the type locality; those followed by (T) have been found only at Twelvemile 

 Creek or Twelvemile House: those with (F) between Mussel Rock and Twelvemile House, and those with (S) at Felt 

 Lake, near Stanford University. Those species marked with an asterisk (*) are supposed to be extinct.] 



KCHINOIDEA. 



Echinarachnius excentricus Eschscholtz. 

 *ScuteIla iuterliiieata Stimpson. 



I'ELECYrOD.\. 



*Arca trilineata Conrad. 

 Carilium corbi.s Martyii. 

 *Cardiuui nieekianum Oabb. 

 Cardiiim quadrigenarium Conrad (F). 

 Chione succincta Valenciennes. 

 Cr\-ptoinya californica Conrad. 

 Macouia calcarea Gmelin. 

 Maconia in(iuinata Deshaye.s (T). 

 Macoma na.suta Conrad. 

 Macoma (like sabulosa Spngl. ). 

 Mactra californica Conrad. 

 Modiolus rectus Conrad (T). 

 Mytilus californianu.? Conrad. 

 Mytilus edulis Linne. 

 Ostrea sp. ? 



Pecten latianritus Conrad (S). 

 Pododesinns uiacroscbisina Deshayes. 

 Psephis lordi Baird. 



* Saxidomus gibboi<us t.iabb. 

 Saxidonius gracilis Gould. 

 Siliqua patula Dixon. 

 Solen sicarius Gould. 

 Spisula falciita Gould. 



* Tapes staleyi Galib. 

 Tapes staminea Conrad. 



PELECYPouA — continued. 



Tresus nuttalli Conrad. 

 Venericardia \entricosa ("iould. 



(lASTEROPODA. 



Astyris gausapata Gould. 

 *Astyris richthofeni (iabb. 

 Bittium asperum Gabb. 

 Bittiuni filosuni Gould. 

 Chrysodoinus Uratiis Martyn. 

 Chrysudomus taVjulatus Baird. 

 Crepidula princejis Conrad. 

 Crejiidnla navicelloides Nuttall. 

 Drillia incisa Carpenter. 

 Drillia inermis Hind.=. 

 Litorina planaxis Philippi (S). 

 Lunatia lewisii Gould. 

 Monoceros engonatuni Conrad. 

 Margarita pupilla Gould (S). 

 Massa fossata Gould. 

 Xa.ssa niendiea Gould. 

 Natiea clausa Broderip and Sowerby. 

 Olivella biplicata Sowerby. 

 Olivella intorta Carpenter. 

 Pleurotoraa sp. indet. (F). 

 Purpura canaliculata Duel. 

 Purpura saxicola ValencienneB. 

 *Trochita filosa (iahl). 

 Turritella sp. 



In southorn California the Merced is represented by a .somewhat different fauna 

 fi-om that found at the type locality. The Pliocene of Deadnian Island. Los Angeles" 

 County, though representing a horizon probably a little lower than the bulk of the 

 Merced, has a fauna which may be taken a,s approximately representing the Merced 

 horizon in the southern part of the State. This Deadman Island fauna is as follows: 



List of Pliocene fossils f ram Dendman Island. 

 [Those marked with an asterisk (*) are believed to be extinct.] 



ANXnozoA. 

 CaryopliylHa californica Vaughan. 



BRACHIOPODA. 



Laqueus jeffreysi Dall. 

 *Terebratalia smithi Arnold. 



PELECYPODA. 



Chama pellucida Sowerby. 

 Corbula luteola Carpenter. 

 Cuniingia californica Conrad. 

 Kellia laperousii Deshayes. 

 Leda taphria Dall. 



iiLawson, A. C. 1893, pp. H4-145; 1895, p. 460: also Ashley, G. H., l,S9,i, pp. 332-333. 



