LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

232 lower cretaceotffi deposits in california and oregon
or calcareous sheath; surrounded by only a thin horny envelope, crystallizing in
minute prisma; siphunele small, marginal, consisting of short funnels, pinched at the
perforations, expanding between the septa toward the apex of the cone; other charactors
not known. A small fragmentary example found with the holotype, showing
10 septa, has a total length of 40 mm. and a maximum diameter of 29 mm.; it this
represents the anterior end of the phragmaeone, its computed length would be not
less than 160 mm. In this example tbe envelope consists of three thin concentric
layers, the central one being thicker than the others and showing the trace of the
eopta on its outer surface. Three examples were found at tho type locality, Loc.
113 CCalif. Acad. Sci ), at the head of Mitchell Creek, 4 miles southwest of Ono,
Shasta County. The holotype was associated with PolyptychiU* sAostanm, hyfoeernu
aaturnale, h. aulaeum, and AafcteuCAis it) the upper part of the
Paskenta group.
SEPIOIDEA Zittel
CEONDSOPHOBIEAB Fischer
JWttfcutta* Gabb
PtiloUuihis folialus Gabb
Fliloleulhi* Joliatut GABB, Paleont. Calif., vol. 2, 1869, p. 128, pi, 19, fig. 4; "Shasta
Group," Cottonwood Creek, Shasta County.
This unusual apecies, the only one of its order yet described from the Cretaceous of
California, is known only from Gabb's drawing and description. Along with his
figure of the species, Gabb (1869a, pi. 19, figs. 2a-f) also illustrates various fragments
of crab claws, of which he eays (p. 127):
'They are from a dense gray el aye tone, associated with Ptilofeulftu /