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II.—On some Fossil Entomostraca from Brazil

Published online by Cambridge University Press:  01 May 2009

T. Rupert Jones
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Extract

A collection of about twenty specimens of three or four kinds of shales, bearing several Estherian and small Molluscan fossils, was made by Mr. Joseph Mawson, F.G.S., Superintendent of the Bahia and San Francisco Railroad, several years ago, and presented by him to the British Museum. These are marked with the distances, in kilometres, from Bahia on the railway; and are provisionally referred by Mr. Mawson, some to the “Cretaceous” and some to the “Wealden” series.

Type
Original Articles
Information
Geological Magazine , Volume 4 , Issue 5 , May 1897 , pp. 195 - 202
Copyright
Copyright © Cambridge University Press 1897

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References

page 196 note 1 Probably the Estherüna Bresiliensis, described further on.

page 196 note 2 Quart, Journ. Geol. Soc., vol. xvi, 1860; pp. 263–8.Google Scholar

page 196 note 3 Estheria Mawsoni, sp. nov. (to be deseribed shortly), and some small Lamellibranchs appear to belong to this section, at kilometres 12–13 from Bahia.

page 197 note 1 It is probable that E. Mawsoni (to be described subsequently) was seen by Mr. Hartt at Pitanga and Pojuca.

page 197 note 2 To be described in another communication.

page 198 note 1 The prodissoconch is more or less persistent in some bivalved Molluscs, as Sphcerium, Pisidium, Ostrea, Avieula, etc.

page 200 note 1 Christiania Vidensk.-Selsk. Forhandl. 1887, No. I; Cyclestheria Hislopi, p. 8 et seq., pls. i and ii, vii and viii.Google Scholar Archiv. Math, og Naturw., vol. viii, pt. 1, 06, 1896Google Scholar; Estheria Packardi, pp. 1–27, pis. i–iv.Google Scholar

page 202 note 1 The subtrihedral shape of these Astartes is wanting here, and they are too large.Astarte agraria measures 20 mm. x 19 mm., and the thickness of the carapace is 12 mm. A. cŒlata, Münster, about 5 mm. long; A. planissima, Forbes, has definite Molluscan characters, and is about 12 mm. long.