Reviev^ of Recent Geological Literature. 251 
minute the creature lies before you and you can examine almost 
every part of its structure inside and outside. In this way in- 
valuable assistance may often be obtained by a worker who is 
unable to buy or perhaps, in consequence of their size, unable to 
keep the bulky specimens which he nevertheless desires to con- 
sult or to compare. 
All this fails to give more than a scanty account of the treas- 
ures that the geologist can see at Rochester, and no mention has 
been made of other lines of study in which equally rich stores of 
material are kept. Ornithology, ichthyology and all the branches 
of zoology including human anatomy are comprehensively repre- 
sented, and from a whale to a lancelet, from a humming-bird to 
an eagle, the museum is able to meet at once almost any call that 
may be made upon it. Ward's Natural Science Establishment is 
the Mecca for the American geologist and naturalist and a pil- 
grimage there is a sure profit and a joy. 
EEYIEW OF EECEI^T GEOLOGICAL 
LITEEATUEE. 
An Introduction to the study of the Oenerd of Paleozoic Bracldopoda. 
Part I. By James Hall, assisted by John M. Clakke, Albany, New York, 
1892. The work before us is the first part of Vol. viii, Paleontology of 
New York. In this and the succeeding volume, which will be part two 
of Vol. VIII, Paleontology of New York, the veteran paleontologist of 
America designs to set before the student the present knowledge of the 
genera of that most common and most interesting group of fossil? , the 
Brachiopoda. Necessarily the discussions and illustrations of these 
volumes are limited to Paleozoic brachiopods. As usual, the class 
Brachiopoda is divided into two orders, and for these the author uses the 
simple and convenient terms proposed by professor Huxley, the Inarticu- 
lata and the Artirulnta. To the definition and general discussion of the 
genera of the I narticulata the author devotes 183 pages; while 13 plates 
are occupied by generic illustrations of the same group. The remaining 
portions of the volume, about 170 pages and 29 plates, are given to the 
forms usually referred to the three closely related families, Orthida, 
StropJiomenidce and Productid(e. The spire-bearing brachiopods, the 
Ehyncfiondlidtt', Pentaineridce and I'erebratuloid forms, will be discussed 
in the second pact of the volume. No attempt is made to arrange the 
genera either of the Articulata or Inarticidata in groups having the 
rank of zoological families. 
The manner in which the author treats the genus Orthis will illustrate 
