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LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

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explanation op plates 281'<br />

PLOATE 40.—<strong>CRETACEOUS</strong> FOSSILS<br />

(1) Pwcwtii ditiwi (Anderson). Holotype, front view. (See PI. 12). p. LFLS.<br />

(2-4) Chelonicerttt irregulars nov. Holotype. (2) Side view of inner (mostly<br />

aeptate) whorl. Greatest diameter, 110 mm,; thickness of whorl, 33 mm. (3) Detached<br />

portion o( body-chamber, sise reduced, showing lose of ventrolateral tubercules.<br />

(4) Plaster cast made from mold on the dorsal Bide of body-chamber (Fig, 3)<br />

showing tubcrcules, p. 17&,

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