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. 1905 Excerpt: ...higher than wide, low and increasing very slowly in height; little embracing, and scarcely indented by the inner whorls. The sides and venter are flattened, the umbilical shoulders are rounded, and the ventral shoulders subangular, this character being more pronounced in the late adolescent stages than at maturity. The ...
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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. 1905 Excerpt: ...higher than wide, low and increasing very slowly in height; little embracing, and scarcely indented by the inner whorls. The sides and venter are flattened, the umbilical shoulders are rounded, and the ventral shoulders subangular, this character being more pronounced in the late adolescent stages than at maturity. The umbilicus is very wide and shallow, being nearly one-half of the entire diameter of the shell. The septa arc goniatitic, consisting of a divided ventral lobe, a large first lateral lobe, and a small second lateral just above the umbilical shoulder. There is no auxiliary lobe, but the internal lateral is visible, on account of the evolution of the shell, outside the umbilical suture. The antisiphonal lobe is long and divided. a Die Dyas: Lethaai Palteozoica, Bd. 2, Llcferung 3 (19U1), p. 478. The septa are exactly like those of Lecanites except in the lack of an auxiliary lobe, there being only eight lobes in Paralecanites and ten in Lecanites. The surface at maturity is nearly smooth, ornamented only with nearly obsolete low radial folds. In early youth, up to a diameter of about 5 mm. the folds are much stronger, and the cast is marked with distinct constrictions that run from the umbilicus across the venter. At this stage, also, the cross section of the whorl is rounded instead of subquadratic, and the ventral lobe was undivided, the division taking place at a diameter of a little more than 5 mm. This early adolescent stage of Paralecanites is like that of Jumodiscus, as described and figured in this paper, and the mature form is very like the larval stages of Meekoceras. This points to Paralecanites as the radicle of the Meekoceratida?, which family must have developed in the Permian, for highly specialized representatives are known at the...
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Add this copy of Triassic Cephalopod Genera of America to cart. $18.38, good condition, Sold by Neil Shillington rated 3.0 out of 5 stars, ships from Hobe Sound, FL, UNITED STATES, published 1905 by Government Printing Office.
Add this copy of The Triassic Cephalopod Genera of America to cart. $22.66, good condition, Sold by Anybook rated 4.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1905 by Washington Government Printing Office.
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In good all round condition. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 2000grams, ISBN:
Add this copy of The Triassic Cephalopod Genera of America to cart. $30.00, new condition, Sold by Weller Book Works, A.B.A.A. rated 2.0 out of 5 stars, ships from Salt Lake City, UT, UNITED STATES, published 1905 by Government Printing Office.
Add this copy of The Triassic Cephalopod Genera of America to cart. $35.00, new condition, Sold by Weller Book Works, A.B.A.A. rated 2.0 out of 5 stars, ships from Salt Lake City, UT, UNITED STATES, published 1905 by Government Printing Office.
Add this copy of The Triassic Cephalopod Genera of America to cart. $35.00, Sold by Weller Book Works, A.B.A.A. rated 2.0 out of 5 stars, ships from Salt Lake City, UT, UNITED STATES, published 1905 by Government Printing Office.
Edition:
1905, Government Printing Office
Details:
Publisher:
Government Printing Office
Published:
1905
Language:
English
Alibris ID:
16216498715
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Add this copy of The Triassic Cephalopod Genera of America... to cart. $57.56, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2012 by Nabu Press.