﻿TEXTULARIA. 



133 



characters of T. eximia. In England it is found more or less frequently throughout the 

 Carboniferous Limestone Series ; in Scotland it occurs in the Calciferous Sandstone, and 

 Lower Carboniferous Limestone Group, and possibly in the Upper division as well. 

 M. d'Eichwald records its presence in the Fusulina-rocks of Russia. 



Textularia Jonesi, Brady. PI. X, figs. 20 — 22. 



Textularia cuneiformis, Jones, 1850. In King's Monogr. Perm. Fossils, p. 18, 



pi. vi, fig. 6. 



— — Reuss, 1854. Jahresb. d. Wetterauer Gesellsch., vol. for 



1851—1853, p. 73. 



— — Richter, 1855. Zeitschr. d. deutsch. geol. Gesellsch., 



vol. vii, p. 532, pi. xxvi, fig. 23. 



— — Geinitz, 1861. Dyas, Heft 1, p. 122, pi. xx, fig. 35. 



— — Schmid, 1867. Neues Jahrb. fur Min., Jahrg. 1867, 



p. 588. 



Characters. — Test short, broad, complanate, tapering; depressed over the line of 

 juxtaposition of the two series of segments. Segments nearly opposite, long, narrow, 

 slightly convex. Margin thin, but little constricted at the sutures. Length yg- inch 

 (0 - 5 mm.). 



The figure in King's Monograph to which Prof. T. Rupert Jones attached the name 

 Textularia cuneiformis is not very intelligible, the obscurity being probably the result 

 of distortion in the specimen or its injury in process of fossilization — at any rate Dr. 

 Richter's drawings in Geinitz's £ Dyas ' yield a more satisfactory basis for description 

 and comment. But through the kindness of my friend Mr. J. W. Kirkby, who 

 has sent me his only English specimen of the species (PI. X, fig. 20), and of Dr. 

 Richter who has supplied me with two additional drawings from fine examples in his 

 own collection (figs. 21, 22), I am not entirely dependent on previously published 

 materials. 



The English example (fig. 20) is smaller than those of the Thuringian Zechstein ; it 

 is but little more than ^ inch (0"44 mm.) in length, the width across the top being 

 almost exactly the same, and it has altogether about sixteen segments. Dr. Richter's 

 specimens are larger and have a correspondingly greater number of chambers. The 

 singular feature of all, whether English or German, consists in the arrangement of the 

 chambers, the two series being almost exactly opposite, instead of alternating with each 

 other. This is so uniform a character that a doubt has more than once occurred to me 



