Reviews—Etheridge’s Paleozoic Fossils, 81 
approach those from the Jurassic strata than the Tertiary and Recent 
forms. The new species are arranged according to the classification 
proposed by Heckel in his Challenger work, and figures of them are 
given in the accompanying eight plates. Dr. Riist also adds a 
tabular list showing the geological distribution both of the Jurassic 
and Cretaceous species.—G. J. H. 
Tee) SEVERE BEG VV SS 
I.—Fosstts oF THE British JSLANDS, STRATIGRAPHICALLY AND 
ZOOLOGICALLY ARRANGED. Vol. I. PatLmozoic, ComPRISING THE 
CAMBRIAN, SILURIAN, DevonriaAN, CARBONIFEROUS, AND PERMIAN 
Species. Wire Aprenprx To 1886. By Rosert Hruerrmes, 
E.R.S. L. & E., F.G.8. 4to. pp. 468. (Oxford, Clarendon 
Press, 1888.) 
HE ranks of our geological army, like that of most other special 
scientific bodies, are well-filled with workers of all kinds, nor 
are writers and compilers absent from its many-sided staff. 
Text-books are now so numerous that it is often difficult to advise 
the tyro which to adopt,—nor are the writers of separate essays and 
memoirs by any means waning, to judge from the constant flow 
of these productions which find their way into the pages of the 
GronocicaL Magazinn, the Quarterly Journal, and other similar 
publications. 
The writing of original articles, and describing individual 
specimens, form perhaps the lightest stratum of our geological 
architecture. 
Monographs on special subjects have also their attractive aspect, 
but they may fairly be reckoned amongst the more solid portions of 
our paleontologic structure. 
Text-books may be, and very often are, the necessary outcome of 
a long course of oral instruction, carefully and conscientiously given 
to students in training; or of an equally arduous pursuit of field- 
work; but some, doubtless, have originated mainly from a careful 
application of ‘scissors and paste,” with connective tissue of more 
or less firm consistence—usually less. 
But of those who mainly work for the benefit of others, none 
deserve our gratitude more than the compilers of Catalogues, 
especially of such a confessedly-arduous work as that of a Catalogue 
of British Paleeozoic Fossils, such as that now hefore us, pre- 
pared by Mr. Etheridge. Indeed, the sources of information lie so 
scattered, and so much diligence and discernment are needed in 
dealing with and assorting the varied matters to be gathered 
together, that one can hardly over-estimate the gravity of the task. 
And when all is done—if it ever is done!—much promptitude 
seems needed to seize the right moment for publication and to get it 
out before the next flood-wave of new matter pushes the patient and 
indefatigable compiler back again and prevents him from ever 
getting his Catalogue issued, or at any rate before it must be 
DECADE III.—VOL. VI.—NO. II. 6 
