412 THE KATURAL niSTORT RETIEW. 



Musclielkalk entirely agree with the "Wellenkalk of his district, that 

 rock ought henceforth to be called AVellenkalk ; for no representa- 

 tive of the true (Upper) Muschelkalk has hitherto been observed in 

 the Alps. The Jurassic rocks occurring in Baden he refers to the 

 Cornbrash and the Inferior Oolite. 



3. " On the Changes rendered necessary in the Geological Map 

 of South Africa, by recent Discoveries of Fossils." By Dr. H. N. 

 Eubidge, F.G-.S. — Dr. Eubidge first called attention to a former 

 X^aper, in which he pointed out the occurrence of horizontal beds of 

 sandstone resting on the upturned edges of gneiss, and continuous 

 with inclined sandstone of like kind interstratified mth gneiss. He 

 therefore conjectured that the Clay-slate and Bokkeveldt schist, which 

 Bain considered distinct, belonged to one formation, that they are of 

 the same age as the gneiss, and that the " Carboniferous rocks " of 

 the Eastern province were not separable from the Clay-slate, which 

 Mr. Bain had called Primitive clay-slate. It follows from this that 

 if the clay-slate proved Devonian, as Dr. Eubidge believed it would, 

 the horizontal quartzite must be much newer, and probably an out- 

 lying mass of the Dicynodon-rocks. He explained these phenomena 

 by supposing that rocks of widely difierent ages had been metamor- 

 phosed into masses having the same mineralogical characters. The 

 discovery of certain fossils has lately verified the conjecture respect- 

 ing the Devonian oge of the clay-slates and Bokkeveldt rocks ; and 

 Dr. Eubidge therefore infers that the rest of the old rocks are of the 

 same age. ^Finally, the discovery of a Calamite in the sandstone, not 

 unlike some specimens belonging to the same genus found in the 

 Dicynodon-rocks renders the probability of the truth of the second 

 conjecture very great. 



3. LiKNEAN Society, (Burlington House.) 



MarcJi 2nJ, ISGo. 



The following papers were read : — 1. " On the Surface-Fauna of 

 Mid-ocean. No. 1. Polycistina and other Allied Ehizopods." By 

 Captain Samuel E. J. Owen. 



2. " On a New Dye-wood of the genus Cudranea, from East 

 Tropical Africa." By Dr. J. Kirk, E.L.S. 



3. " Letter from Mr. C. A. Wilson, of Adelaide, South Australia, 

 containing some observations on the natural history of South Aus- 



