NOTICES OF MEMOIRS. 
159 
Description of some new Genera of Molluska. By 
William M. Gabb. [ Proc . Acad . Nat. Sciences , Phila- 
delphia, 1872, p. 270.] 
Twelve new genera of fossil molluska from the miocene 
deposits of Haiti are described in this communication, and 
figures of the typical forms are given. It will remain for 
future inquiry to determine if any and which of the names 
proposed ought to stand. 
On the Topography and Geology of Santo Domingo. By 
William M. Gabb. [Transactions American Philoso- 
phical Society, vol. xv., pp. 49 — 259.] 
This communication contains the results of a three years’ 
geological survey of the greater part of the territory occupied 
by the Republic of Santo Domingo, in the island of Haiti, 
conducted by Professor Gabb and his assistants, under the 
auspices of the government of the Republic. A geological 
map of the country accompanies the paper, which may be 
regarded as a valuable contribution to our knowledge of the 
physical structure of the West Indies. The formations found 
by Prof. Gabb to occur in Haiti are classed as post-pliocene, 
miocene, cretaceous, and eruptive. A very large number of 
fossils are recorded and described by Prof. Gabb, whose 
remarks on previously described species will be of great use 
to paleontologists. Many new species are described, some 
of which are unquestionably open to revision. 
On the West Indian Tertiary Fossils. By R. J. Lechmere 
Guppy, F.L.8., F.G.S., etc. [Geological Magazine , 
1874, Sept, and Oct., and 1875, January.] 
This paper is for the most part a resume of what has been 
