434 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 10, 



The genera are Balmania, Phacops, Orthoceras (2 species), Murchi- 

 sonia (2 species), Loxonema, Holopea (?), Lucina (?) or Anatina (?), 

 Avicula (?), Leptodomus (?), Spirifer, Chonetes (?), Atrypa, Rhyn- 

 chonella (?), Retzia (?), Strophomena, Orthis, Discina, Favosites, 

 Zaphrentis (2 species), Syringopora ('?), and other corals. The ma- 

 terial at hand is limited, and many of the shells are much distorted. 

 Joints of an Encrinite with a smooth column are common. 



2. Eesults of Geological Obsektations in Baden and Franconia. 

 By Dr. F. Sandberger, For. Corr. G.S., Professor at the Univer- 

 sity of Wiirzburg. 



[Communicated and translated by W. J. Hamilton, Esq., F.R.S., 

 Pres.G.S., &c.] 



Introduction. — The great interest which the Geological Society of 

 London has for many years taken in my labours renders it im^jera- 

 tive on me to make known to them, from time to time, those results 

 of my observations which have any claim to general importance. 

 I therefore propose, in the following pages, to communicate as 

 briefly as possible the more important results of the study of the 

 Palaeozoic, Triassic, and Jurassic beds in Baden and Franconia, 

 which I have recently made, both at Karlsruhe and at Wiirzburg. 



Palceozoic beds. — In 1856 I ascertained that the so-called Transi- 

 tion formation in the southern portion of the Black Forest did not 

 deserve this name ; but that from its containing Calamites radiattis, 

 Brongn,, 0. transitionis, Gopp., Sagenaria Veltheimiana, Gopp., and 

 other typical plants, it should be considered as Lower Carboni- 

 ferous (Culm). This conclusion has been recently confirmed to its 

 full extent by Schimper's beautiful monograph on the extension of 

 these beds into theVosges ('Le terrain de transition desVosges,' Stras- 

 bourg, 1862), founded chiefly on a comparison with the Baden speci- 

 mens which I had communicated to him. The Transition formation 

 in the Black Forest is therefore only represented by black unfossili- 

 ferous slates in the south, and by green slates alternating with red 

 limestone in the northern portion of the mountains near Baden, the 

 precise geological age of which cannot for the present be ascertained. 



The next division of the Coal-formation, in ascending order, is the 

 deposit of Berghaupten, near OiFenburg, which also occurs in Alsace; 

 it contains, together with some forms of the lower division, a large 

 proportion of such as are peculiarly connected with the Flora of the 

 principal Coal-formation. I hope that Schimper will also give us a 

 monograph of these beds. I have carefaUy examined, for the Baden 

 Government, the detached deposits of the Upper Coal--ormations 

 which occur near Baden, Oppenau, Hinterohlsberg, and Geroldseck, 

 and have published an account of them in two works which I 

 have recently forwarded to the Society, namely, ' Geological De- 

 scription of the neighbourhood of Baden,' 1861, and ' Geological 

 Description of the Smoke-baths (Rauch-Bader), with the Geological 

 Maps ' (1 : 50,000), 



