A Monograph of the Tertiary Entomostraca of England : Together with A Supplementary Monograph of the Tertiary Entomostraca of England by T. Rupert Jones and C. Davies Sherborn Paperback

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. 1856 Excerpt: ...oblong, rounded obliquely at the extremities, upper and lower borders nearly straight; valves depressed anteriorly, most convex just behind the centre and towards the ventral border; right valve markedly narrower than the left; its hingeline outstanding, being notched fore and aft: surface ornamented with small wellmarked sub-hexagonal or circular pits, arranged in longitudinal lines, except on the anterior portion of the valves, where the pitting affects transverse and concentric lines; punctation very fine, and lying in depressed lines or striae in young individuals; coarser and less distinctly linear, and somewhat transverse, in old specimens.

A variety, white and smooth, almost destitute of punctations, or rather with exceedingly minute linear pittings, is common; and some individuals are partially punctated.

The hinge is strongly developed. Dorsal aspect elongate-acute-ovate; end-view suborbicular.

This species appears to belong to the same type as C.

Jurinei, Minister, and its varieties, figured and described by Bosquet (' Descript.

Entom. Tert., ' p. 56. t. 2, figs. 9, 10), C. Meyni, Reuss ('Zeitsch. Deut. geol. Ges., ' viii, p. 279, t. 10, fig. 5), and Bairdiu (?) semipunctata, Bornemann (Tbid., vii, p. 359, t. 21, fig. 1). I have met with a very similar form in Tertiary sand from Bordeaux.

Cythere Woodiana occurs very plentifully, in different stages of growth, and with several variations as to intensity of punctation, in the Crag of Suffolk, --and bears the name of Mr. Searles N. Wood, who has for many years, and with great success, collected, studied, and elucidated the fossil? of the Crag. To Mr. Wood I am indebted for the majority of the specimens from the Crag described in this Monograph.

No. 11. Cythere Laqueata, spec. nov. Plate III, figs. 3 a-...