^^ POSSIL ESTHERI^. 



Li„s.la tenumima at Sukbad and DouDlail m„. ,T T Z , * ' ^'*"") ' "'"" 



.e™.„ab,e. „e.e .een b, Albe,.« i„ JmL™™ imi::! trs/o " "'"' "'"""'"'" ""' °''''- 



Al p. 320, It la stated that Psammod.s Elytra. Amclu .uhcoMa, PoMonia mimta a„d W^- 

 tuM arenaceum occ„ both in the Banter Sandstone- and in the Kenper. ' '^ 



1834-40. In A. Goldfuss's "Petrefacta Gemania./ Zweiter Theil. (1834-40) p 118 

 the following oecuis : i ■»";, t). iio, 



'■ Po«<fo«« ,M-„fe, nobis, PI. 113, fig. 5. Posidonia testa minuti, transyersim ovato 

 rot^da p ana, matmculata, costis majoribus concentricis (8-10) minoribnsque marginal; 

 bus eonferfs. Zieten, I. c. pi. 54, fig. 6. These small sheUs oecnr bed-like Tn the 

 Keuper, espeotally at Hassfurty (not far from Sehweinfnrth),^ near Heilbronn,* and a 

 Pfor.hetm.» Usnally there is only the impression of the outer surfaee, rarely tl,e rjmains o 

 he extremely thm sheU The shell is flat, obliquely roundish oval, and has 8-10 eonve 

 egdar, eoneentnc wnnkles. In the lower third these beeome smaller, and lie elo s"; 

 together. There are no ear-like processes." 



1843 In giving an account of the Triassie beds of Wurtemberg, 1848 (' Das Ploz<.e 

 bt^e Wurtem erg^p. 541, ^c), E. A. Q„enstedt separates the LettenkohL-g up f :!" 

 the lower part of the Keuper, and ranks it as the upper member of the Musehelkalk 

 Hence some authors refer to Mstleria .inula as belonging to the Keuper af: 

 Albertfs classification; whilst others speak of it as being Wef in th sede 'd he 

 oceurrmg m the Upper Musehelkalk or between that and the Keuper, accord in/L the 

 views as to the relafons of the Lettenkohle for this is regard d by some as bein. 



strit "^^z:. """^ -' "'^ ^-- «--- — -- 



HMlhrnnn the T.v 7 , .i . ^ I'lsuy, tuat in the tsthenan marlstone, near 



neilbronn, the Ltnfful<s are only three sixteenths of an inch in lene-th Th;« „. a ^ a ^ . . 



L^l. (in the jat. „. s,., Ton, two. and one a h..), as ^ ^e ^"Stsert ot^' X^ nd ' 

 cates the gradually .nereasing in^aenee of son,e agency unfavorable to the growth of these BrZhilod" 

 such perhaps, as a larger and larger infln. „, fresh water into their halitat. nntiU warrtecate 

 snfflcently free front sa t to allow of the presence of ^,«er,-., whilst the Lin,.,. *„»„„. still rvT 



is at p."ora:L::d":: z:r' ''"°"*" '" ""-'• °' "^ '-- =-'- ^"^^•°-- - p ^». ^- ^ 



2 In Bavaria, on the River Main, thirty-four miles north-east of Wurzburg 



3 In Bavaria on the right bank of the River Main, twenty-four miles north-north-east of Wurzburg 



of Heidelbl; ■'' '" ""'''''' ^^^"'^""''^ ""' '' '"''''''' ^^^"^^-^- -^'- -""•^'- 



« TUbl'gen' 81^184?"'"" '^ '^' ^"' '"'^ '^' ^"^"^^' "^^'''^ ""'^"^ '''''''"''' «^ Karlsruhe. 



