LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

EXPLANATION OF PLATES 253
PLATE 8—CRETACEOUS FOSSILS FHOU CALIFORNIA AND BRITISH COLUMBIA
(1, 2). AiiciUa cra&ricollii Keyeerling. Back and. front views of an example from
Winalow bridge, Glenn County. Length (incomplete), 65 mm.; greatest width,
40 mm,; thickness, 25 mm. Base of Paskenta group, p. 103.
(3, 4) Aucella •piriformis Lahusen. Back and front views of left valve. Length,
50 mm.; width, 37 mm.; thickness 23 mm, Lower part of Paskenta group; Winalow
bridge, Glenn County, p. 105,
(5, 6) Aucella inflata Toula. Top and Bide views of an example from Wins low
bridge, Glenn County. Length, 55 mm.; width of left valve, 42 mm.; thickness
of both valves, 37 mm. Lower part of .Paskenta group, p. 104.
(7) Aucella erajtta Pavlow. Left valve of an example from "Zone L", McCarthy
Creek, Tehama County. Length, 39 mm.; width, 40 mm. Lower part of Paskenta
group, p. 103.
(8, 9) Aucella lahuseni Pavlow. Examples from Stony Gorge dam, near Elk
Creek village, Glenn County. (8) Left valve; length, 47 mm.; width (if complete),
24 mm, (D) Left valva of smaller example. Length, 40 mm.; width, 20 mm. Lower
beds of Paskenta group, p. 106,
(10) Aucella indigenaliM nov. Holotype, showing right valve and upper part
of left valve. Length, 55 mm.; width of right valve, 33 mm. Lower Cretaceous beds,
Graham Island, British Columbia, p. 107.