This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1833 Excerpt: ... a small lamina. Fossil. Birostrites. Shell inequivalve, two horned, disc of the valves obliquely elevated conically, unequal, obliquely diverging, nearly straight, horn-shaped, the one enveloping the other at base. Fossil. Discina. Shell inequivalve, rounded, oval, somewhat depressed; valves nearly equal in size, each ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1833 Excerpt: ... a small lamina. Fossil. Birostrites. Shell inequivalve, two horned, disc of the valves obliquely elevated conically, unequal, obliquely diverging, nearly straight, horn-shaped, the one enveloping the other at base. Fossil. Discina. Shell inequivalve, rounded, oval, somewhat depressed; valves nearly equal in size, each having a very distinct, central, orbicular disc; disc of the superior valve not perforated, rising into a mamillary protuberance; that of the other valve very white, with a transverse slit. The identity of discina and orbicula has been so satisfactorily proved, that the former is now given up. D. ostreoides. Crania. Shell inequivalve, suborbicular; inferior valve nearly flat, perforated on its internal face by three unequal, oblique holes; superior valve convex, sub-gibbous, with two prominent callosities within. THe three holes in the crania do not seem to perforate it completely, unless by accident, when removed from the body to which it was fixed by the outer surface; hence they cannot be the issues of muscles. These holes give the lower valve the appearance of a death's head. C. personata. BRACHIOPODA. The shell of the brachiopoda is more or less inequivalve, and opens by a hinge; the true ligament of the valve is not known. The shell always adheres to marine bodies. Orbicula. Shell suborbicular, inequivalve; no conspicuous hinge; inferior yalve very thin, flat, adhering to marine bodies; superior subconic with an acute vertex more or less prominent. The lower valve is sometimes so thin as to b scarcely perceptible, whence Muller supposed it to be a univalve shell, and referred it to the patella). O. norvegica. Terebratula. Shell inequivalve, regular, subtriangular, attached to marine bodies by a short, tendinous pedicle; beak of the...
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Add this copy of Lamarck's Genera of Shells With a Catalogue of Species to cart. $18.93, new condition, Sold by Paperbackshop rated 4.0 out of 5 stars, ships from Bensenville, IL, UNITED STATES, published 2019 by Hardpress Publishing.
Add this copy of Lamarck's Genera of Shells: With a Catalogue of Species to cart. $30.83, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2019 by Hardpress Publishing.
