Studies in Evolution; Mainly Reprints of Occasional Papers Selected From the Publications of the Laboratory of Invertebrate Paleontology, Peabody Museum, Yale University
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In our eReader you can find the full English version of the book. Read Studies in Evolution; Mainly Reprints of Occasional Papers Selected From the Publications of the Laboratory of Invertebrate Paleontology, Peabody Museum, Yale University Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Studies in Evolution; Mainly Reprints of Occasional Papers Selected From the Publications of the Laboratory of Invertebrate Paleontology, Peabody Museum, Yale University
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To quickly assess the difficulty of the text, read a short excerpt:
Orthothetes suhplanus Conrad, 1842.
(Plate XVI, figures 14-20.) Streptorhynchus subplanum Hall. Twenty-eightli Ann. Rept. N. Y. State Mus. Nat. Hist., p. 151, pi. 21, figs. 20-33, 1879.
Hall. Eleventh Ann. Rept. State Geol. Indiana, p. 288, pi. 21, figs. 26-33, 18S2.
The series selected to represent the development of this species comprises fourteen specimens ranging from 1.5 mm.
to 26.. 5 mm. in length. The external features of form and surface ornament are remarkably constant from the young t...o the mature shells. There is, however, a slight ^jrogressive modification in the relative convexity of the valves. The dorsal valve of young and half-grown individuals is nearly flat, while the ventral is moderately convex. In old .speci- mens both valves are convex, with the dorsal somewhat more so than the ventral. The most marked changes due to advancing growth are those which take place in the hinge.
Some mention of these is made under the description of Stro2}honella striata, where it is stated that the pedicle-tube retains its embryonic form and size nearly ujd to maturity, after which it is obscured by the internal thickening of the shell; also, that the callosity under the beak of the dorsal * British Fossil Brachiopoda, III, Devonian and Silurian, 283, 284, pi.
What to read after Studies in Evolution; Mainly Reprints of Occasional Papers Selected From the Publications of the Laboratory of Invertebrate Paleontology, Peabody Museum, Yale University?
You can find similar books in the "Read Also" column, or choose other free books by Charles Emerson Beecher to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Orthothetes suhplanus Conrad, 1842.
(Plate XVI, figures 14-20.) Streptorhynchus subplanum Hall. Twenty-eightli Ann. Rept. N. Y. State Mus. Nat. Hist., p. 151, pi. 21, figs. 20-33, 1879.
Hall. Eleventh Ann. Rept. State Geol. Indiana, p. 288, pi. 21, figs. 26-33, 18S2.
The series selected to represent the development of this species comprises fourteen specimens ranging from 1.5 mm.
to 26.. 5 mm. in length. The external features of form and surface ornament are remarkably constant from the young t...o the mature shells. There is, however, a slight ^jrogressive modification in the relative convexity of the valves. The dorsal valve of young and half-grown individuals is nearly flat, while the ventral is moderately convex. In old .speci- mens both valves are convex, with the dorsal somewhat more so than the ventral. The most marked changes due to advancing growth are those which take place in the hinge.
Some mention of these is made under the description of Stro2}honella striata, where it is stated that the pedicle-tube retains its embryonic form and size nearly ujd to maturity, after which it is obscured by the internal thickening of the shell; also, that the callosity under the beak of the dorsal * British Fossil Brachiopoda, III, Devonian and Silurian, 283, 284, pi.
What to read after Studies in Evolution; Mainly Reprints of Occasional Papers Selected From the Publications of the Laboratory of Invertebrate Paleontology, Peabody Museum, Yale University?
You can find similar books in the "Read Also" column, or choose other free books by Charles Emerson Beecher to read onlineMoreLess
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