Monograph On the British Fossil Echinodermata From the Cretaceous Formations Vo
Monograph On the British Fossil Echinodermata From the Cretaceous Formations Vo
Wright, Thomas, 1810-1877
The book Monograph On the British Fossil Echinodermata From the Cretaceous Formations Vo was written by author Wright, Thomas, 1810-1877 Here you can read free online of Monograph On the British Fossil Echinodermata From the Cretaceous Formations Vo book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Monograph On the British Fossil Echinodermata From the Cretaceous Formations Vo a good or bad book?
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2294). Description. Very little can be made out concerning the structure of this ophiurid. The disc appears to have been surrounded with a circlet of large radials. It has a diameter of about 16 mm. A plasticine mould of the lower portion of the cast is figured on PI. XXVII, fig. 2 a. The jaws (oral angle plates) are distinctly seen. They were long and slender, and similar in form to those of 0. Serrata. Similarly a peristomial plate is not visible. The inter-radial rounded buccal shield is cle...arly seen. The arm is 4'5 mm. Broad at the base. The impression of the cast of the arm appears to indicate that both upper and lower arm-plates were small, as the side arm-plates appear to meet in the dorsal and ventral median lines. Locality and Stratigraphical Position. From flint gravel, Mousehold, Norwich. 3. OPHIUBA PARVISENTUM, n. Sp. PL XXVII, figs. 4, 4 a. Specific Characters. Disc covered with small plates, radials inconspicuous. Proximal upper arm-plates only occupying about one third of dorsal surface of arm.
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