no. 1617. NEW CRETACEOUS AND TERTIARY FOSSILS—ARNOLD. 858 
GASTEROPODA. 
~Agasoma kernianum Cooper. Megatabennus (cf.) bimaculatus Dall. 
Fissuridea, species, a. Natica (cf.) ocoyana Conrad. 
Fusus stanfordensis, new species. Trochita costellata Conrad. 
Galerus inornatus Gabb. 
A second fossiliferous horizon, believed to be somewhat younger 
than the last, is represented by the fauna found in Pescadero Creek 
near the mouth of Jones Gulch and on the Halliday ranch near 
Portola. The fauna from the middle part of the formation is as 
follows: 
List of fossils from the lower portion of the Purisima formation. 
PELECYPODA, 
Arca canalis Conrad. Pecten healeyi Arnold. 
Arca trilineata Conrad. Pecten oweni Arnold. 
Cardium meekianum Gabb. Pecten purisimaensis Arnold. 
Chione (aff.) gnidia Broderip and  Pecten wattsi Arnold. 
Sowerby. © Phacoides acutilineatus Conrad. 
Clidiophora punctata Conrad. Phacoides nuttalli Conrad, var. ante- 
Cryptoma ovalis Conrad. cedens Arnold. 
Dosinia ponderosa Gray. Solen sicarius Gould. 
Macoma nasuta Conrad. Tapes staleyi Gabb. ° 
Mactra albaria Conrad. Tellina, new species, a. 
Nucula (Acila) castrensis Hinds. Venus pertenuis Gabb. 
Panopea generosa Gould. : 
GASTEROPODA, 
Chlorostoma stantoni Dall, var. lahon- Natica clausa Broderip and Sowerby. 
daensis, new variety. Neptunea (aff.) humerosa Gabb. 
Chrysodomus imperialis Dall. Olivella intorta Carpenter. 
Chrysodomus (aff.) liratus Martyn. Clivella pedroana Conrad. 
Chrysodomus stantoni, new species. Pleurotoma, species, ad. 
Crepidula princeps Conrad. Solariella (aff.) peramabilis Carpenter. 
Fusus portolaensis, new species. Thais crispata Chemnitz. 
Lunatia lewisti Gould. — Tornatina culcitella Gould. 
Nassa californiana Conrad. Tritonium, species, a. 
The upper part of the Purisima formation usually consists of fine 
soft sandstone with harder calcareous and often fossiliferous beds 
intercalated. These upper beds are typically exposed in the sea cliffs 
in the vicinity of Purisima and south to the mouth of Pescadero 
Creek, in the region immediately east of Point Ano Nuevo and in the 
region east of Santa Cruz. 7 
The following fossils occur in the upper portion of the Purisima 
formation : 
List of fossils from the upper portion of the Purisima formation, Santa Oruz 
quadrangle. 
ECHINOIDEA. 
Astrodapsis, new species, p. 
23 
Proc. N.-M. vol. xxx1v—08 
