130 Reviews—Hall and Clarke— Paleozoic Brachiopoda. 
I].—On a Mrrerortc Stone FounpD At MAKARIWA, NEAR INVER- 
caRGILL, New Zeatanp. By G. H. F. Utricu, F.G.8., Prof. 
of Mining and Mineralogy in the University of Dunedin, New 
Zealand. (Proc. Royal Society, London, 183.) 
YHE specimen described in this Memoir was found in the year 
1879, in a bed of clay, which was cut through in making a 
railway at Invercargill, near the southern end of the Middle Island 
of New Zealand. Originally this meteorite appears to have been 
about the size of a man’s fist, and to have weighed 4 or 5 lbs., but if 
was broken up, and only a few small fragments have been preserved. 
The stone evidently consisted originally of an intimate admixture of 
metallic matter (nickel iron) and of stony material, but much of the 
metallic portion has undergone oxidation. Microscopic examination 
of thin sections shows that the stony portion, which is beautifully 
chondritic in structure, contains olivine, enstatite, a glass, and 
probably also magnetite, and through these stony materials the 
nickel iron and troilite are distributed. The specific gravity of 
portions of the stone was found to vary between 93°31 and 3:64, 
owing to the unequal distribution of the metallic particles. A partial 
chemical examination of this meteorite was made by the author and 
Mr. James Allen, but the complete analysis has been undertaken 
by Mr. L. Fletcher, F.R.S., of the British Museum. ‘The analysis, 
which, when finished, will be communicated to the Royal Society, 
has gone so far as to show that the percentage mineral composition 
of the Makariwa meteorite may be expressed approximately by the 
following numbers; nickel iron 1, oxides of nickel and iron 10, 
troilite 6, enstatite 39, olivine 44. 
I5y, En VA SE a WWE Ss 
J.—Awn Inrropuction To THE Stupy oF THE GENERA oF PaL#ozorc 
Bracutopopa. Part I. By Jamus Hatt, assisted by Jonn M. 
Cuarke. Geological Survey of the State of New York. 
Paleontology. Vol. VIII. 1892. Large 8vo. pp. xvi. 367, with 
43 Plates. 
N many valuable volumes Professor Hall has described the 
Paleozoic fossils of the State of New York. In the long series 
of years during which he has been labouring in his appointed field, 
progress has necessarily been made in other lands and by other 
workers. Consequently, work that was admirable twenty years ago 
runs some risk of being overlooked at the present day unless it is 
brought into line with recent discoveries. ‘To summarise and con- 
solidate the knowledge of the past enables us to appreciate better 
both the perfections and imperfections of our science, and affords 
the surest ground for further progress. This is the task that is now 
being attempted for Paleozoic Brachiopoda by Messrs. Hall and 
Clarke, and the first-fruits of their toil are seen in the volume 
before us. 
The plan of this work is to describe very completely each genus 
