i88i.] 
Analyses of Books . 113 
speaks of “ that extreme and dogmatic form of Darwinism 
which in Germany has been designated as Haeckelism.” Be- 
tween Profs. Haeckel and Semper there is, to use a homely old 
phrase, “ no love lost.” As instance we may refer to Prof. 
Semper’s work, “ Haeckelismus in der Zoologie ” (Hamburg, 
1876), and to the Preface to the third edition of Prof. Haeckel’s 
“ Evolution of Man,” which may be consulted in the English 
version (London : C. Kegan Paul and Co., 1879). One bone of 
contention between these two authorities is, that whilst Prof. 
Haeckel seeks to derive the Vertebrates from the Amphioxus, 
Prof. Semper seeks their parentage among the Annelida. Indeed 
the mutual relations among the chiefs of the new school of 
Natural History in Germany are much less amicable than might 
be desired. 
For our general estimate of the work before us the reader 
must be referred to our December number. We regret having 
to add that the translator has not always succeeded in rendering 
the original into idiomatic English. We read, e.g., that Nestor 
mirabilis, of New Zealand, “ sips the most minute wounds on a 
living sheep.” Again, “ Dr. Gunther, in London, has lately 
made a remarkable attempt to explain,” &c. : “ of London ” 
would be the customary English expression. These and other 
inaccuracies and inelegancies will, we trust, be corrected in any 
future edition. 
We are, however, very glad to find that Prof. Semper’s work 
has been made accessible to the many English naturalists who 
do not read German. 
Report of the United States Geological Survey of the Territ ties 
Vol. XII. Washington : Government Printing-Office. 
This volume is _devoted to Dr. Joseph Leidy’s monograph of 
the Fresh-water Rhizopods of North America — a tribe of beings 
which, though exceedingly minute, are of high importance as 
being probably the starting-point of animal life in point of time, 
and as rock-formers are of unsurpassed importance in the eco- 
nomy of Nature. The author describes upwards of a hundred 
species. There are forty-seven plates, some of them containing 
as many as forty well-executed figures, mostly coloured. Prof. 
Leidy notes that the Rhizopods, like many other minute forms 
both of animal and vegetable life, though often abundant in the 
light superficial ooze at the bottom of still waters, never pene- 
trate into the deep black mud, a medium unfavourable to organ- 
isms of every kind. 
The thoroughness of this work makes us the more regret that 
it is mentioned as one of the “ final ” reports of the Survey, 
