arnold] fossil mollusks from california 421 



List of Lower Miocene (Vaqueros Formation) Fossils from Western End 

 of Santa Ynez Range 



(Those marked "a" are from locality No. 4504, three-fourths of a mile up 

 ridge northeast of San Julian ranch house, 10 miles southeast of Lompoc, the 

 type locality of Modiolus ynezianus ; those marked "b" are from locality No. 

 4478, 2 miles south of Santa Ynez, on knoll just east of mouth of Ballard 

 Canyon, the type locality of Pecten vanvlecki.) 



Balanus cf. cstrellanus Conrad. 



Cardium aff. quadrigenarium Conrad a . 



Chione cf. mathewsonii Gabb. 



Conns, species. 



Crassatvllites, species. 



Meretrix ( ?) species. 



Modiolus ynezianus, new species a . 



Mytilus cf. mathewsonii Gabb. 



Ostrea eldridgei Arnold a b . 



Ostrea, new species, near titan Conrad a . 



Pecten {Pecten) vanvlecki, new species b . 



Pecten (Lyropecten) bowersi Arnold. 



Pecten (Lyropecten) crassicardo Conrad. 



Pecten (Amusium) lompocensis Arnold. 



Pecten (Lyropecten) magnolia Conrad ab . 



Pecten (Chlamys) sespeensis, var. hydei Arnold b . 



Purpura vaquerosensis, new species. 



Solen, species. 



Terebratalia kennedyi Dall. 



Turritella, species indeterminate. 



Turritella ineziana Conrad. 



Turritella variata Conrad (young). 



The Fernando formation in the Santa Maria district is wide- 

 spread, and consists largely of soft shale, sandstone, and more or less 

 incoherent conglomerate, usually resting unconformably above the 

 Monterey or middle Miocene shale. The most fossiliferous local- 

 ities appear to represent a fauna of lower Pliocene age, although the 

 formation as a whole is believed to extend down into the upper 

 Miocene and upward into the Pleistocene. 



The following new species and varieties are described from the 

 Fernando formation in the Santa Maria district, all of the localities 

 being north of the Santa Ynez River : 



List of New Species and Varieties of Fossils from the Fernando Forma- 

 tion (Largely Lower Pliocene), Santa Maria District 



Lymncea alamosensis, new species. 



Drillia graciosana, new species. 



Drillia waldorfensis, new species. 



Bathytoma carpenteriana Gabb, var. fernandoana, new variety. 



