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not consider long lists without figures of much use to the student, hut in 
all cases some of the most characteristic forms are noticed. 
Among the concluding chapters we have one on u Sub-aerial phenomena,” 
such as the production of springs, caverns, peat, soils, &c. ; and another on 
igneous and metamorphic rocks and on mineral veins. An appendix con- 
tains a glossary of geological terms, which is generally, though not quite 
always, correct in its definitions, and a table of the classification of the 
animal kingdom with special reference to palaeontological purposes. The 
illustrations consist of diagrammatic sections and a good many very nice 
views ; the former might perhaps be increased in number with advantage. 
There is also at the beginning of the volume a small coloured geological 
map showing very clearly the distribution of the various formations. 
In conclusion we may say that Mr. Woodward’s treatise will be found an 
excellent guide for all who wish to study the geology of this country, and 
at the same time it will be of considerable value to more advanced geologists 
who may often find it exceedingly convenient to refer to for particulars of 
the relations of those minor divisions in the series of deposits, the details of 
which are so apt to slip out of even the most tenacious memory. 
AQUARIA.* 
S INCE Mr. Warrington invented the aquarium, some five-and-twenty 
years ago, the appreciation of such means of studying aquatic animals 
has spread very widely, both in this country and abroad. Naturally there have 
been an abundance of books, good, bad, and indifferent, written as guides to the 
management of the aquarium and its inmates, but few of them can claim to 
tell their story in a more practical and at the same time pleasant fashion 
than Mr. J. E. Taylor in his little volume now before us. In it he gives a 
brief account of the history of the aquarium, followed by a chapter on the 
principles on which the formation of an aquarium is founded, and then pro- 
ceeds to explain the management of fresh water and marine aquaria of 
various kinds, and the mode of stocking them with tenants, and to sketch 
the natural history of some of the more interesting objects, both animals and 
plants, which may with advantage be kept in these indoor pools. In these 
brief biographical sketches Mr. Taylor, after his wont, puts all that he has 
to say in a most readable form, but at the same time we are glad to see 
that he does not lose sight of the fact that the aquarium is to be regarded 
as a means not only of amusement but of instruction ; and he loses no op- 
portunity of indicating in what manner the supposed toy may be made sub- 
servient to the latter purpose. The little book is copiously and very nicely 
illustrated, and may be recommended as an admirable gift-book for any 
young people whose parents and guardians are not deterred by the fear of 
possible 11 messes ” from encouraging in their charges a taste for the prac- 
tical study of the natural history of our seas and fresh waters. 
* “ The Aquarium ; its Inhabitants, Structure, and Management.” By 
J. E. Tavlor, Ph.D., F.L.S., F.G.S., &c. London: Hardwicke & Bcgue. 
1876 . ' 
