192 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [DeC. 13, 



having been examined by M. Briinner, proved to form a very instruct- 

 ive trough, as expressed in figs. 9 and 10, the lowest rocks on either 

 side being the upper neocomian (b), surmounted by the Sewer-kalk 

 (d) or equivalent of the inoceramus limestone, and this by a basin of 

 nummulitic limestone and flysch (/, ^)*. 



Fig. 9. 



Fig. 10. 



Stansted. 



Stanz. 



d f d 



g. Flysch. 



/. Nummulite limestone. 

 d. Sewer-kalk or chalk. 

 b. Neocomian (upper). 



The lowest of these diagrams, fig. 10, represents the general rela- 

 tions at the south-western end of the promontory, between Stansted 

 and Stanz, where the nummulitic rocks are squeezed up, whilst fig. 9, 

 on the strike of the same strata to the W.N.W., shows how the basin 

 of nummulitic and flysch rocks expands and becomes regular. 



The Orbitolites, which occupy beds of considerable thickness in the 

 mountains of Ralhgstock and Beattenberg, near Thun, are here con- 

 tained in a green calcareous sandstone of a few feet thickness only, 

 whilst the Nummidites millecaput (Boubee), or polygyrata (Desh.), 

 is much developed, and seeming, according to Briinner, to replace in 

 this spot the small N. rotularis (Desh.), or iV. globulus (Leym.). 

 The first-mentioned large and striking species, which is so extensively 

 distributed over the globe, reappears in many other tracts to the 

 north-east, as will be hereafter detailedf . 



* When M. Briinner examined this promontory he had not had his attention 

 called to the thin band of secondary greensand or gault which we afterwards found 

 so usually intercalated (as in Savoy) between the upper neocomian and the inoce- 

 ramus limestones ; and in a rapid examination, looking chiefly to the great relations 

 and general symmetry of the trough, a few feet of greensand may he thinks have 

 escaped him. (See fig. 10.) 



t In my tour I necessarily used the specific names given to the Nummulites and 

 other Foraminifera of the Swiss Alps by Riittimeyer and Briinner ; but on com- 

 paring the forms I collected, M. D'Archiac, to whom I referred them, identi- 

 fies several of them with species previously named and described in France. Thus, 

 whether the following names, as given in Italics, be finally adopted or not, their 

 equivalents being here mentioned, no misunderstanding can arise. The fact which 



