ESTHERIA MINUTA. 51 



In the marls of the Muschelkalk of the same district, von Secbach also found 

 P. mimita, with GerviJHa sociali'^, Wism., Cohiodas varius, Gieb., and casts of 



Cj/theres. 



Hanover. Dr. Volger, of Gottiugen, mentions in the ' Neues Jahrbuch f. Min.,' 1S4C, 

 p. 818, the occm-rence oi Posidonomi/a mimda in the neighbourhood of Gottingcn, at 

 Ellichausen, in the Upper Keuper, and near Abbecke in the Soiling, not far from Dasscl,^ 

 in the Upper Bmiter Sandstone (laminated sandstone, alternating mth marl-beds), in great 

 numbers; and he suggests, "may it not be a bivalved Crustacean?" 



In 1800. Baron von Strombeck, of Brunswick, described the position of the beds 

 containing Estheria minuta, near Salzgitter, Hanover, in his paper^ on the Myophoria-- 

 beds, published in the ' Zeitschrift dcr deutsch. geol. Gesellschaft,' vol. xii. From infor- 

 mation derived from Herr Schloenback, the following series of beds is said to be observed 

 at the foot of the Greif and at the Salgenteich, near Salzgitter^ (p. 387). 



Variegated Keuper-marl. 



Lettenkohle, 1 inch. • 



Greyish-yellow, micaceous, and argillaceous sandstone, alternating with dark-blue laminated clay. 



Myophoria pes-anseris, M. transversa, Lingula temnssima, and Posidonomya minuta. 

 Eeddish-brown clay ; in its upper part a limestone (2 feet thick), containing Myophoria StrncJananni, 



M. jies-anseris, and Ammonites ((keratites') nodosus : 20 to 50 feet. 

 Muschelkalk. 



Close to Liineberg,* at, and near the Schafweide, the section appears to be from 

 von Strombeck's account (p. 381, &c.) — 



Variegated Keuper-marl. 



Laminated clay (with Linyula tenuissima), alternating with thin beds of limestone, full of pseudo- 



morphic salt-crystals. 

 Dolomitic beds,^ with Myophoria pes-anseris and Ammonites nodosus. 

 Dark greenish-blue clay: 100 feet. 



1 la the valley t)f the Solleu, twenty-tlu'ee miles north-north-west of Gottiugen. 



- 'Ueber die Trias-Schichten mit Myophoria pes-anseris, Schlot., auf der Schafweide zu Liineburg.' 



•' See the geological map of this district, in ' Karsten's Archiv',' xxvi, pi. I. 



1 For a map, see 'Zeitsch. deutsch. geol. Gesell.,' 1853, vol. v, pi. 11, 



'•> Belonging, according to the author, to the Lettenkohle-group, and not to the Upper Muschelkalk. 

 See also Von Strombeck's paper ' Ucber das Vorkommen von Myophoria (Trigonia, Lyriodon) pcs- 

 ansens, Schlot., sp.' 'Zeitsch. d. deutsch. geol. Ges.,' 18.58, vol. x, p. 80, &c. In this memoir (p. 86), 

 Posidonomya mimda is said to occur here and there in the Myoplioria-heils, but not abundantly, in com- 

 pany with MyophoricB, Myacites letticus, Gervillia socialis, Pectcii A'bertii, Lingula tenuissima, Sec. 

 The last mentioned is figured in Bronn's 'Lethsea Geognost.,' vol. ii, part 3, p. 51, pi. 13, fig. <j. At 

 Liineburg, it lias not so sharp an umbo as ia Bronn's figure. It occurs plentifully on the surface-planes 

 of the shales, and occasionally in the other beds, and always preserves its brownish thin shell (contrasting 



