Annual report of the United States Geological Survey to the Secretary of the Interior . go 291. 3. A large, nearly perfect specimen, figured by White, the original of his figures 2a, 2b, pi. 36 (Twelfth Ann. Rept. U. S. Geol. and Terr., 1883, p. 133). This specimen is of the type of 1 of thisplate, though much Dorsal view, after White. 3b. Side view of same, after White. This drawing shows the lateral angu-lation mentioned by Meek. (See also lc, le, 2b, 2c, 2d, etc.) 3c. Posterior view of same, showing the broad, undefined ventral sinus,and the lateral angulation of the s
Annual report of the United States Geological Survey to the Secretary of the Interior . go 291. 3. A large, nearly perfect specimen, figured by White, the original of his figures 2a, 2b, pi. 36 (Twelfth Ann. Rept. U. S. Geol. and Terr., 1883, p. 133). This specimen is of the type of 1 of thisplate, though much Dorsal view, after White. 3b. Side view of same, after White. This drawing shows the lateral angu-lation mentioned by Meek. (See also lc, le, 2b, 2c, 2d, etc.) 3c. Posterior view of same, showing the broad, undefined ventral sinus,and the lateral angulation of the same valve. ?>il. Anterior view of same, showing high fold and limestone; Station 48. 4. A very large though imperfect specimen; one of the types figured by White (1. c, pi. 33, figs. 4a, 4b). This gibbous specimen is of thesame type as that shown by fig. 1 of this plate, though much larger. Ventral view, after White. 4/;. Dorsal view of same. 4c. Side view of same. Ouray limestone; Station 48. 78 ? U. S. GEOLOGICAL SURVEY TWENTIETH ANNUAL REPORT. PART II. PL. VI. FOSSILS FROM THE OURAY LIMESTONE THE MERIDEN GRAVUS6 CO- LlBRAnr OF THE UNIVERSITY of ILLINOIS. PLATE VII. 79 » F L A T E V I I Camarotocchia EndliCHJ 1. A small example of the type of tig. 1, PI. Dorsal view, showing undefined fold. 1//. Ventral view, showing broad, undefined sinus. lc. Side view, in which the lateral angulation of the ventral valve is well exhibited. Id. Posterior view, showing the broad, though ill-defined, fold and sinus and the lateral angulation of the ventral valve,le. Anterior view showing the character of the fold and sinus. These are seen to be marked by a few strong ribs, the more lateral plications in this, and also in other individuals, manifesting a marked tendency toward limestone; Durango 294. Ca MA ROT03CHIA CONTRACT A? 2. A small but characteristic specimen, and the best preserved which has come under my observation. Much larger shells of
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