English: MR. E. B. NEWTON ON FOSSILS FROM MADAGASCAR. 331
•will require to be modified, and perhaps some of the opinions ex-
pressed cancelled  ; and until the region is explored and surveyed by
practical and competent men we cannot hope to see the geological
structure of the country properly unravelled or its phenomena fully
explained.
EXPLANATION OF PLATE XIII.
Geological Map of the Northern part of Madagascar.
(Scale about 80 miles = 1 inch.)
APPENDIX.
Notes on Fossils from Madagascar, with Descriptions of two
New Species of Jurassic Pelectpoda from that Island. By
R. Bellen Newton, Esq., F.G.S., British Museum (Natural
History).
.Plate XIV..
These fossils were referred to me for determination by Dr. Wood-
ward, F.R.S.
They are mostly in a bad state of preservation, many of them
being merely casts. The collection, however, is important as form-
ing nearly the first series of Malagasy fossils that have ever reached
this country, and, on this account, we are considerably indebted to
the collector, the Rev. Richard Baron, for having furnished us with
material explaining the palseontological history of certain parts of
Madagascar. The specimens, obtained from various localities in the
north-west of the island, represent the Eocene, Cretaceous, and
Jurassic formations. I have included in this Appendix a notice of
a few fossils kindly lent me by the Rev. Dr. Deane of Edgbaston,
which were collected several years ago in South-west Madagascar
by the Rev. J. Richardson of Antananarivo. They consist of Jurassic
specimens, three of which are in such good condition that I have had
them figured, one being a new species of Pelecypoda, viz. Sphcera
madagascariensis.
In drawing up this paper I wish to acknowledge assistance kindly
rendered me by R. Etheridge, Esq., F.R.S.  ; G. C. Crick, Esq., F.G.S.  ;
and C. D. Sherborn, Esq., F.G.S. , in their respective subjects.
TERTIARY.
Pisces.
Some Fish Otoliths accompanying the collection were, I

 am   in-   
formed,   discovered   on   the   surface   of   the   ground   at   Ankoala,   so,   in   
all   probability,   they   are   of   recent   origin,   though   bodies   similar   to   
them   in   form   and 

structure do occur in the Upper Eocene (Barton
Beds) of Hampshire.
Mollesca.
This group is represented by several internal casts of Gasteropoda [..]