52 Earthquake at the Philippine Islands. 
the beds of the Hamilton. They occur there. in abundance; 
they present a remarkable variety of form (seven species), and 
the type attains its greatest dimensions in the Hamilton. 
Their appearance characterizes an epoch which differs much in 
all its fauna from the preceding. They continue quite abund- 
ant during the following periods. There are seven species in 
the Portage, five in the Chemung. 
All the forms which we have passed in review are figured 
in a style which does great credit to the draughtsmen of 
Mr. Hail, Messrs. G. B. Simpson and H. M. Martin. The fifth 
volume of the Paleontology of New York, of which we have 
endeavored to give some idea to the readers of the Revue, is 
then essentially a work of paleontological specification. But it 
contains besides important geological observations: such are 
the examinations made by Mr. Hall in the vicinity of Louis- 
ville, Kentucky, to determine the age of some fossils found 
near the Falls of the Obio, 
This volume is destined, like the greater part of those preced- 
ing it by the same author, to make an epoch in science; for 
notwithstanding the labors of Roemer, Sandberger, Kayser and 
Gessler, upon the Devonian formation, we have not such com- 
plete descriptions of the fauna of this period as have now been 
given in America by Professor Hall. Thus the Paleontology 
of New York will always occupy an honorable place among 
the publications of official geological surveys. 
Art. V.—Earthquake at the. Philippine Islands, of July, 1880. 
(Plate IV.) 
ipinas en Julio de 1880."* From this volume we translate the 
following account of the seismometrical observations made—as 
_ * Published at Manila. in a duodecimo of 152 pages. (Establecimiento Tipograph- 
ico de Ramirez y Giraudier a . de ©. Miralles, Magallanes, 3.) For the 
_use of the copy of this volume which has supplied the facts here given, this 
ata & indebted to Professor E. C. Pickering, Director of the Harvard College 
rvalory. Pte) 
