326 Reviews—W. EL. Ford—Dana’s System of Mineralogy. 
Edrioaster levis (1914, p. 117) are among names we have failed to find. 
Brachiocrinus, J. Hall, is another. Per contra Botryocrinites, the 
name of a series, is quoted as that of a genus. Butsuch slight errors 
and omissions are almost unavoidable in a first edition. 
The ‘‘ Bibliographic List’’ is followed by an alphabetical index of 
trivial names, showing the genera to which each has been attached. 
There is also an alphabetical list of generic names only, with page 
references to the same names arranged under a biological classification. 
This is useful, but it might have saved the reader’s time had the 
main systematic position been indicated by a contraction in the main 
list, as in Sherborn’s Jndex Animalium. The faunal lists which 
follow must have cost a deal of work, which it is to be hoped will prove 
warranted by the use made ofthem. The alphabetic list of American 
Formation names will certainly be most useful, for there are over 700 
used in the book. The correlation of the more important among 
them is displayed in a set of tables, on the same plan as that adopted 
in KE, O. Ulrich’s ‘ Revision of the Paleozoic Systems”’ (1911). 
Geologists and paleontologists will be most grateful to Dr. Bassler 
for his labours and to the Smithsonian Institution for the publication 
of this exceedingly valuable aid to research. 
IJ.—Dana’s System or Mrinrracoey. 
Tuirp APPENDIX To THE SrixtH Eprrion or Dana’s ‘‘SystEM OF 
Mineratoey’’. By Witiram E. Forp. pp. xiii+87. New 
York, John Wiley & Sons, Inc.; London, Chapman & Hall, Ltd. 
1915. Price 6s. 6d. net. 
VERY working mineralogist has a copy of Dana’s great book 
lying on his table, and would find himself considerably hampered 
without its aid. Like all books of the kind, as soon as it appears it 
starts to become out of date. The sixth edition itself was published 
in 1892, nearly a quarter of a century ago. It is of such a size that 
frequent revision was difficult, if not impossible; on the other hand, 
_mineralogy, like other branches of science, does not stand still, but 
has made steady progress. The difficulty was met to some extent by 
the issue of appendices, of which the first appeared in 1899 and ‘the 
second in 1909. The present appendix covers the six years from the 
beginning of 1909 to the end of 1914, but, as the author points out 
in his prefatory note, the outbreak of war caused some disturbance in 
the mail services, and it is possible that some of the publications that 
appeared towards the close of the year were not received and have 
therefore not been included. This appendix has been entirely 
prepared by Professor Ford, who had completed the second appendix 
after ill-health had compelled his colleague, Professor E. 8. Dana, to 
relinquish the task in 1906. 
As in the previous appendices, the minerals referred to are arranged 
in alphabetical order, while a classified list of new names is given in 
the introductory pages. Reference to the volume is therefore 
exceedingly simple. Altogether 180 new names are included, but 
the author regards only one-third of them as well established, the 
