252 THE GEOLOGIST. 



Bristol dolomite (Trans. Geol, Soc. of London, 2nd series, vol. 5, 

 p. 359) ; and concludes that the animal found at Chappon belongs to 

 the same species, or, at all events, the same genus. 



Mineralogy, — Analysis of the " Glossecolite Shepard" by M. F. Pisani. 



This substance, which resembles the " Halloysite" in its formation 

 and properties, was found at Dade in the province of Georgia : M. 

 des Cloiseaux, the discoverer, gives the following description of it. 



" The glossecolite shepard is compact, and breaks with a conchoidal 

 fracture ; it is dull looking, but with rubbing it becomes bright ; it 

 is white and sharp to the taste ; it does not soften in water, but 

 becomes transparent on the edge and opaline, throwing off bubbles 

 of air, and giving out a strong clayey smell. Soft and very fragile, 

 water is disengaged in the " matras," and the mineral becomes a 

 bluish grey. It is infusible with the blowpipe, and gives a beautiful 

 blue with nitric of cobalt : sulphuric acid attacks it, heat being 

 applied. 



" The glossecolite shepard is composed of — 



Silica " 40-4 



Aluminum 37'8 



Magnesium 0*5 



Water 21*8 



100-5 



Some New Geological and Mineralogical Discoveries in the Five 

 Principal Volcanic Departments of France. 



M. Bertrand de Lorn, in a memoir under this title read before 

 the French Academy gives some interesting details tending 

 to show the great richness of these districts in gems and 

 crystals, especially corundum and crysolite, twelve thousand 

 specimens of the former having been found by him previously to his 

 last exploration, which we may remark, has occupied him six years. 



Geological Residts of a Voyage of Discovery along the Coasts of the 



Bed Sea. 



M. Courbon, surgeon on board a French frigate which has been sur- 

 veying the coasts of the lied Sea by order of the Emperor, has sent in 

 a very valuable report of the natural history part of the expedition, 

 the geological portion of which, illustrated by numerous sections and 

 five large maps made from notes taken on the spot, will form a very 

 valuable addition to our knowledge of the strata of the districts 

 bordering thereon. 



The localities which appear to have been more particularly studied 

 are (he bay of Adulis and island of Dissee, Edd and Haycok, Perim 



