PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 69 
3. “On the Foraminifera and Ostracoda from the deep boring 
at Richmond.” By Prof. T. Rupert Jones, F.R.S., F.G.S. 
4. * Polyzoa (Bryozoa) found in the boring at Richmond, Surrey, 
referred to by Prof. J. W. Judd, F.R.S.” By G. R. Vine, Esq. 
Communicated by Prof. Judd, F.R.S., Sec. G.S. 
5. “On a new Species of Conoceras from the Llanvirn beds, 
Abereiddy, Pembrokeshire.” By T. Roberts, Esq., B.A., F.G.S. 
6. “ Fossil Cyclostomatous Bryozoa from Australia.” By A. W. 
Waters, Esq., F.G.S. 
7. “Observations on certain Tertiary Formations at the south 
base of the Alps, in North Italy.” By Lt.-Col. H. .H. Godwin- 
Austen, F.R.S., F.G.S. 
8. “On the Geological Position of the Weka-Pass Stone.” By 
Capt. F. W. Hutton, F.G.S. 
9. “On the Chemical and Microscopical Characters of the Whin 
Sill.’ By J.J. H. Teall, Esq., F.G.8. 
10, “A Critical and Descriptive List of the Oolitic Madreporaria 
of the Boulonnais.” By R. F. Tomes, Esq., F.G.S. 
11. “On the Structure and Affinities of the family Receptaculi- 
tide, including therein the genera /schadites, Murch. (= Tetragonis, 
Hichw.), Sphwrospongia, Pengelly, Acanthochonia, g.n., and Recep- 
taculites, Defr.” By Dr. G. J. Hinde, F.G:S. 
12. “On the Pliocene Mammalian Fauna of the Val d’Arno.’’ 
By Dr. C. J. Forsyth Major. Communicated by Prof. W. Boyd 
Dawkins, F.R.S., F.G.S. 
13. “ Notes on the Geology and Mineralogy of Madagascar.” By 
Dr. G. W. Parker. Communicated by F. W. Rudler, Esq., F.G.S. 
[ Abstract. ] 
This paper commenced with a sketch of the physical geography of 
the island of Madagascar. A central plateau from 4000 to 5000 feet 
high occupies about half the island, rising above the lowlands that 
skirt the coast, and from this plateau rise in turn a number of 
volcanic cones, the highest, Ankaratra, being 8950 feet ahove the sea. 
With the exception of certain legends, there is no record of a period 
when the volcanoes were active: two such legends were given. 
The known volcanic cones were enumerated. They extend from 
the northern extremity of the island to the 20th parallel of south 
latitude. Beyond this granite and other primitive rocks occur as 
ee eee ee ee 
ee a 
SS eee 
f 
