346 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [iVpril 5, 



I am indebted to Mr. Rupert Jones for the identification of the 

 species, which he describes as 



Cardium edule. Bithinia tentaculata. 



Ostrsea edulis. Paludiua marginata. 



Unio ? Valvata cristata. 



Bulimus lackamensis. piscinalis. 



Limnaeus glaber. 



Besides these I found a small Helix and a Planorbis, which have 

 been unfortunately broken. 



From the numerous species of the land and freshwater shells enu- 

 merated by Mr. Morris * from a deposit about twelve miles north of 

 this, I have no doubt that the future researches of the Marchioness 

 of Huntly will add several species to the above list. 



The marine shells {Cardium) from this pit were given me by the 

 men, from a heap of fragments of bones and bouldered oolitic shells, 

 and were evidently freshly detached from their matrix. Their posi- 

 tion in the lower part of the gravel rests on their authority. 



At the other pit I extracted the marine shells myself, at the depth, 

 as I have stated, of 7 feet from the surface. 



The prevalent fragments in the gravel are derived from various 

 oolitic rocks ; they are considerably water-worn, and are mixed with 

 chalk-flints. There are also fragments of flinty slate, quartzose 

 sandstone, and other rocks of more distant origin. 



This gravel appears to have been formed from the materials of the 

 denuded boulder-clay, with an increased proportion of oolitic mate- 

 rials brought down by the ancient Nene. Chalk, which abounds in 

 the boulder-clay, has nearly, if not entirely, disappeared from the 

 gravel. The only specimens of it which I could find were small 

 rolled pebbles of the very hardest varieties, in the sand interstratified 

 with the clay in the bed d of the preceding section. 



2. On the Geological Structure of jpart of the Bavarian 

 Alps ; with Remarks on the Erratic Phenomena. By 

 Dr. Adolphe Schlagintweit. 



[Communicated by Sir R. I. Murcliisou, F.R.S., F.G.S.] 



Contents. 



1. Introduction. 



2. General view of the Formations. 

 I. Lower Alpine Limestone. 



IL Lower Lias. 



in. and IV. Upper Lias and Jura. 



A. Upper Lias of Ammergau. 



B. Lias and Jura on the Hirschbiihel and Wetterstein. 



C. Red iMarl)le of Graswang and Ettal. 



V. Upper Alpine Limestone. 



VI. Cretaceous Formations. 

 Orbitulite Sandstones, 



* Quart. Jom-n. GeoL Soe. vol. ix. p. 321. 



