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POPULAR SCIENCE REVIEW. 
scarum notes and intercalations, we find little improvement upon the 
edition of 1856. The physiological section of the work, though certainly 
not of an advanced description, is nevertheless good, and, as an intro- 
duction to the more special study, must be considered as of importance. 
The Yertehrata, as usually occurs, are treated of at length, and there is 
little fault to he found with the descriptions. It seems to us, however, 
that the outline of the nervous system is unwarrantably brief, and that 
the omission of all allusion to the vast amount of work done in brain- 
anatomy during the past five years, is hardly justifiable. That portion of 
the volume which embraces the Invertebrata is sadly deficient. We must 
take exception, especially, to the system of classification adopted in the 
instance of Annulosa, or Annulata , as it is therein styled. All modern 
investigations group the echinoderms with the Annuloida and not with the 
jelly-fishes ; moreover, the beroe is no longer placed among the Acalephee 
hut in the order Actinozoa. The chapter on Geographical Distribution has 
undergone some slight change, and embodies a mild attack on the late 
Edward Forbes, which we think might have been omitted. We conceive 
that Mr. Blake would have shown some discretion had he avoided inserting 
his table of classification ; it does not redound much to his reputation as a 
naturalist acquainted with the zoology of 1863. 
GEOLOGY FOR SCHOOLS.* 
T HIS is an excellent little book ; and though the author’s modesty 
induces him to state that it is 44 intended for the use of young 
persons of fourteen or fifteen years of age and upwards,” we have not the 
faintest doubt of its becoming the hand-book of amateur adults, and even 
of junior students. Those interested in geological science are already 
well acquainted with Mr. Beete Jukes’s name as a writer of former 
treatises on popular science, and to the more serious student Mr. Jukes 
is familiar as the contributor of many valuable memoirs to scientific 
journals, and as the Director of the Irish Geological Survey. 44 The 
School Manual ” is divided into three parts : in the first, the geological 
operations now in action are dealt with ; in the second, some of the facts 
observable in the crust of the earth are exposed ; and in the third is given 
the history of the formation of this crust, deduced from facts observable 
in it, as explained by reference to operations which are going on at the 
present time. The language in which the book is written is characterized 
by great clearness of style ; and in every case where expressions borrowed 
from other sciences are employed, an explanation of their meaning is 
given. This is well illustrated in the few paragraphs on the 44 elements ” 
which chemists speak of. The chapter on Earthquakes is particularly 
good, and in it we observe an analysis of Mr. Mallet’s great work on 
Seismology. From what Professor Jukes writes respecting the move- 
* 44 The School Manual of Geology.” By J. Beete Jukes, M.A., 
F.R.S., Local Director of the Geological Survey of Ireland, &c. Edin-* 
burgh ; Adam & Charles Black, 1863, 
