Ixxvi mOCEEDlls'GS OF THE GEOLOGICAL SOCIETY. 



(the spherical) that Savi gives the name of Galhro rosso, and 

 of the mineral appearance and character of which we have a 

 minute description. 



II, Calcareous rocks modified by ophiolitic. To these the 

 name of Ophicalce has been given, inasmuch as they consist of 

 carbonate of lime mixed with serpentinous elements. They must 

 not, however, be confounded with the ophiolitic admixtures with 

 a calcareous matrix, consisting of a great variety of eruptive and 

 sedimentary rocks imbedded in a matrix frequently calcareous, 

 and having all the characters of eruptive rocks. 



The calcareous metamorphosed strata have undergone every 

 possible variety of change, according to the greater or less degree 

 of metamorphic action to which they have been subjected ; but 

 as they are not metalliferous, they are not further alluded to in 

 this paper, although, in a geological point of view, they are of 

 great interest. 



In the second part of the work the author describes the localities 

 in Central Italy where cvipriferous deposits have been found. These 

 metalliferous deposits occur under two different forms, Avhether 

 situated in the eruptive or metamorphic rocks, or along the line of 

 contact of the two. These two forms are either as metallic veins 

 deposited in fissures, or as nodules and rounded masses imbedded 

 in a steatitic clay. The latter is the most frequent, and aflbrds 

 the richest deposits in Tuscany. 



Tertiary. — M. von Koeneu read before the Society not long 

 ago a very interesting paper " On the Correlation of the Oligocene 

 Deposits of Belgium, Northern Germany, and the South of 

 England." In this paper he particularly refers to the fossils re- 

 cently discovered in the railway- cutting near Brockenhurst, and at 

 Lyndhurst in the New Porest. These beds are shown to be of the 

 same age as the Middle Headon beds of Colwell Bay and White- 

 cliff Bay; but as they have a richer and true marine fauna, they 

 are of great importance in comparing the Headon beds with the 

 Tertiary strata of Belgium and the North of Glermany. 



Prom a careful examination of the fossils from this locality in 

 the collection of Mr. Edwards, M. von Koenen has come to the 

 conclusion that they represent the Lower Oligocene of Germany. 

 Of the 56 species contained in this collection, 43 exist in the 

 Lower Oligocene, and 6 are peculiar to the English Brockenhurst 

 and Headon beds ; 21 of them are also found in the Upper Eocene; 

 and 4 pass over to the Middle Oligocene of Germany ; 23 of them 

 are characteristic Lower Oligocene species, which have never yet 

 been met with either in the older or in the younger beds ; there 

 can be no doubt, therefore, that the Brockenhurst beds, and with 

 them the Headon series at Colwell Bay and Whitecliff Bay, belong 

 to the Lower Oligocene. 



The Tertiary formations of Bordeaux and of Dax have always 

 been a subject of great interest to all who have occupied them- 

 selves with Tertiary, and particularly with Miocene Geology. Many 

 attempts have been made to fix their exact synchronism with 



