LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

68 3WJWEH CRETACEOUS DEPOSITS IN CALIFORNIA AND OREGON
The holotype of Cftelontcerat aioJicztenum (Gabb) probably came from
tiiis zone which has recently yielded an immature example of it. No
evidence of this zone has been found south of the North fork of the Cottonwood
Creek.
Tbe Le Conte zone, 1000 feet or more above the Buenaventura, has
yielded a small fauna of distinctive cephalopoda, among which are:
^ Cie&niceras leeoniei (Anderson) jicawiiioph'tei pemnt nov.
C, modi»ttint nov. Sonneraita roterti Hall and Ambrose
C. sp, nov. iYauMuj jrafeW Anderson
The Perrin zone, about 1400 feet above the Buenaventura and about
800 feet below tbe top of the Hulen beds (local base of tbe Chico scries),
contains a larger fauna than the preceding zone, including;
iSonneroJio jwrrinimiiW nov. Hamilit imitator nov.
JS'. gaeramsnlica (Anderson) Anclmra bitmyutaia nov.
S. taffi nov. Nemodvn brttoeriana (Gubb)
S, mulleri nov. Pinna tquiiriUana nov.
Phyllocerae iberetae nov. Phcladomya Aufawwa nov.
Dtplychocerat 1mm Gabb Crab remnms
(7) Ptik/teuthii foliatvz Gabb
It is likely tbat the holotype of AcanthopUtes remondi (Gabb) was
found in this zone, although no example identifiable with it has yet been
found. According to Gabb'a (1869a, p. 127) note, Pliloieaihis foliatus
and CaUianassa stimpsani Gabb were probably also found in this zone.
Crustacean remains have been found in, and also beneath it.
The Neptune zone, so named from a large species of Lytoceras found in
it, is the highest fossil-bearing zone of the Hulen beds in their type area,
although perhaps not so high as that at Horsetown itself. It is exposed
along the east branch of Hulen Creek and about 450 feet beneath the
lowest beds of the Chico series, which here overlaps tbe Horsetown group.
The Neptune zone is here lithologically unlike any of tbe preceding zones,
being composed of a dark sandy, tufaceous material without much clay
or calcareous matter, although concretionary shales crop out immediately
beneath it. Tbe thickness of the Neptune zone is apparently limited to
80 feet and is succeeded above by sandstones and sandy shales, upon which
rest the basal beds of the Chico series. The Neptune zone has been identified
at other points farther south (Dry Creek, Elder Creek, Willow Creek,
and Puerto Creek). At Locality 1659 (Calif. Acad. Sci,), on the east
branch of Hulen Creek, tbe following species have been collected;
Lylottraj) iwpiunitim nov. Bcudaniicera* breuxri (Gabb)
attrarium nov, 4 B. hulenerue nov.
Gattdntctrtw duie9motcTaK mtrriami (Anderson)
Douaiileieerat mammillatum vox. Puiotia, tubquadrala {Anderson)
demotion breictriana (Gabb) Tirtbraivia osulfl nov.
Pinna ttfuuiiiana nov, Pectin (Syncycl&nevut) opsrculiformia
Panopea concentrica Gabb (Gabb)
Turnua pregariui nov.