LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

102 LOWER CRETACEOtffi DEPOSITS IN CALIFORNIA AND OREGON
mcdLary finer coat&c, slightly flexed on the aide and crossing the ventral zone without
interruption; umbilicus broad, section of whorl broadly allipticaJ, a little compressed;
ribs arising on the umbilical wall with a slight flexure, reetirsdiate on the sides, or
slightly flexueua. This species baa the general features of, and somewhat resembles,
the genotype of Holcodiscu* Uhlig, from the Wemsdorfer beds, although larger. It
has even greater resemblance to S. seunem Kilian (1910, pi. 7, Bg. 2) from tho Barlamina
(Montague de Lure) of France, from which it differs chiefly ia its more flexueUA
costae.
The holotype, No. A-2&34 (Univ. Calif. Coll.), consisting of a large fragmentary
example, was found by 5,. L. Riston McCarthy Creek in the lower part of the Horaetown
group (lower Barremian), about g third of a mile west of tbe Paflkanta-Lewry
road. The holotype has the following dimensions: greatest diameter, 250 mm.;
width of umbilicus, 135 mm. (?); height of whorl, 75 mm. ; thickness of whorl, 60 mm.;
suture lines not exposed.
CLEONICEBATIDAE WhitchouM 1026
Whitehouse includes in this family Ckoni terns Parona and BoaarelH, Sonnm-aa'a
Bayle, emend. Spath, and other genera not known in California. The genera here
named are plentiful in the Hulen beds, in strata regarded as middle Albian. Ae found
here these genera appear to be closely related, as seen ia their forms, ornamentation,
and suture lines, and they are found in a relatively limited atratigraphical range of
400 feet; in fact, examples of the two genera have been found within a distance of 20
feet, although not mingled in the same stratum. The forms referred to Ctsemcenu
are lower in the acction than Scmnd:ra(i