102 Prof. T. Rupert Jones — Fossil Bivalved Entomostraca. 



III. Some Triassic and other Estheri^. 



§ 1. New English locality for Estheria minuta (Alberti). 



Some fine specimens have been obtained by Mr. T. J. Slatter, of 

 Eedditch, Worcestershire, in a purplish micaceous clay of the Upper 

 Keuper Sandstone, and in the Lower Keuper Sandstone (Water- 

 stones), near that place. For a general section of the New Eed 

 Sandstone of the district, see " Monograph of the Fossil Estherise," 

 Pal. Soc, 1862, pp. 62, 63. 



§ 2. Notices of H. minuta and some other Estherice. 



Estheria minuta has been frequently referred to by the geologists 

 of Germany since 1862, sometimes with new localities. In Alberti's 

 " Ueberblick iiber die Trias," etc., 1864, it is accepted as a Crus- 

 tacean, and correlated with Posidonomya Albertii, Yoltz, and P. 

 Germari, Beyrich, Zeitsch. deutsch. geol. Ges., vol. ix. 1857, 

 p. 377) ; also doubtfully with P. Wengensis (from Diirrenberg), 

 Giebel, Pal^ontol. Untersuch. (not P. Wengensis of Wissmann and 

 Miinster, Beitrage, etc.. Heft 4, 1841, St. Cassian, p. 23, pi. 16, 

 fig. 12, which is much larger). Posidonomya nodocostata, Giebel, 

 Pal. Unters., pi. 2, fig. 7, is mentioned by Alberti as being prob- 

 ably an Estheria. Alberti's work is briefly noticed in the Geol. 

 Mag. Vol. I. p. 167. 



In the Neues Jahrbuch for 1864, p. 646, etc., Giimbel and Geinitz 

 noticed some Permian (Dyadic) fossils from Thuringia, and among 

 them a new Estheria, — E. rugosa, Giimbel. See Geol. Mag. 

 Vol. II. p. 205. 



Giimbel mentions Estheria minuta as a leading fossil of the 

 Variegated and the Grey Keuper, in his work on the Bavarian Trias, 

 " Die geognostische Verhaltnisse des frankischen Triasgebiets," 

 1865, pp. 53, 55, etc. So also does Frid. Sandberger in his 

 " Beobachtungen in der Wiirzburger Trias," 1865, Wurzb. naturw. 

 Zeitsch. vol. v. p. 221, etc. 



In the Trias of the Taub Valley, Ph. Platz has found E. minuta 

 in a dolomite, associated with a bone-bed, in the Letteukohle series ; 

 N. Jahrb. 1869, p. 585. 



E. minuta, var. Brodieana, is noticed by Fred. Romer as occurring 

 in the Keuper at Paulsdorf in Upper Silesia ; Zeitsch. d. geol. Ges. 

 vol. XV. 1863, p. 702, etc., and in his "Geologic von Obernschlesien," 

 1870, p. 176, pi. 15, figs. 10 and 11; also previously in the Zeitsch. 

 geol. Ges. vol. xv. (1863), p. 702, etc. 



Frid. Sandberger, in the Verhandlungen d. k. k. geol. Eeich- 

 sanstalt, Jahrg. 1871, in his remarks on "Die Estherien-Bank des 

 Keuper in Siidfrankreich (Departement Gard)," p. 225, notes both 

 E. minuta and E. laxitexta, Sandb., which is regarded as a variety of 

 the E. minuta so abundant in the Lettenkohle. 



E. Mangaliensis, Jones, is described by Geinitz as having been 

 found in a bituminous shale (Brandschiefer), of Eha?tic age, from 

 San Lorenzo, Province of Mendoza, South America. See "Pal^onto- 

 graph.," Supplem. iii. Beitrage zur Geologic und PalfBontologie der 

 Argentinischen Eepublik ; ii. Paleeont. Theil, ii. Abtheil. Cassel, 

 4to. 1876, p. 3, pi. 1. figs. 1-6. 



