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 She^ard,'^ by M. F. Pisani. 
This substance, which resembles the " Halloysite" in its formation 
and properties, Avas found at Dade in the province of Georgia : M. 
des Cloiseaux, the discoverer, gives the following desciiption of it. 
" The glossecolite shepard is compact, and breaks with a conchoidal 
fractui'e ; 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 bul)bles 
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 Nevj Geological and Mineralogical Discoveries in the Five 
Frincipal Volcanic Departments of France. 
M. Bertrand de Lom, 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 Besidts 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 Red 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 fi^om 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 the bay of Adulis and island of Dissee, Edd and Haycok, Perim 
