178 Reviews—Hutton and Ulrich’s Geology of Otago. 
field. In fact, the work bears evidence of careful revision through- 
out, and combines such full practical instructions that any stydent 
having mastered the principles of geology ought with this work in 
his hand to be able to do good field-work, whether in this country or 
in any distant land. Everything appears clear and intelligible 
enough for the beginner, excepting perhaps the diagrams on p. "66; 
in these, however, we are justified in finding faults. In table iii. p. 
47, the Crag might have been added, for although it has not yet 
received an index mark in the Survey Table of Strata, at least one 
map showing the Crag (the country around Harwich) has been pub- 
lished. 
In the section on Paleontology, Mr. Jukes-Browne has likewise 
added mnch new matter. And we notice that instead of the list of 
characteristic fossils, which in the former edition was arranged 
zoologically, so that from the fossil the geological position of the 
rock could be determined, we have now two tables, one of the 
characteristic genera belonging to each great division of the strata, 
whether British or foreign ; and the other of the characteristic species 
for the chief sub-formations of each geological system in the British 
Isles and the western portion of Europe. Mr. Jukes-Browne’s 
remarks on the testimony of the fossils are full and interesting. 
And we are led to think that after an attentive study of the work, 
few observers would attempt to describe the geology of any district, 
after making themselves acquainted with the characters of the rocks 
and the names of the fossils, without also making themselves 
acquainted with the practical mapping of the country, which alone 
can explain its stratigraphical features, and enable true pictures of 
the physical geography of each past period to be ultimately drawn. 
II].—Reporr on THE GEoLoGy AnD GoLD-FIELDS oF Oraco (NEW 
Zeatanp). By F. H. Hurron, F.G.8., and G. H. F. Unatcs. 
(Dunedin, 1875.) 
HE general geological structure of Otago is similar to that of 
Westland and Canterbury, and of the twelve different marine 
periods, which, according to Captain Hutton, are found in New 
Zealand, only one, the Ahurni formation belonging to the Tertiary 
period, is altogether absent from Otago; one other, however, the 
Wanganuri (also Tertiary), is represented by lacustrine instead of 
marine deposits. 
The formations belong to the Kozoic, Paleozoic, Mesozoic, and 
Tertiary periods, and are “described in stratigraphical order, as regards 
their character, thickness, fossils, and contemporaneous volcanic 
rocks (when Pe as well as their relation to the underlying 
formation. 
Separate sections are devoted to the physical geography ; the sur- 
face and economical geology of the province. A special report is 
furnished by Dr. Ulrich onthe gold-fields and the occurrence of the 
metallic minerals of the province. Besides a geological map and 
sections, the work contains a table of altitudes, lists of the minerals, 
and of the vertebrate and molluscan fauna found in Otago. J. M. 
