Reviczv of Recent Geological Literature, 383 
one of the chief points of study being the separation of the different 
drift sheets. 
A welcome addition to the information presented by the Iowa 
survey consists in a report on the mineral production of the state, 
the statistics for which were collected and tabulated by the secretary 
of the survey, Miss Nellie E. Newman. The total value of the mineral 
production of Iowa for 1897 was $7,446,800.42, of which nearly five- 
sevenths represents coal. u. s. o. 
Kalgoorlite — a iieiv telluride tnineral from Western Australia. By 
E. F. PiTT.MAN. (Records Geol. Survey, N. S. Wales, vol. 5, pt. 4, pp 
203-204, Feb. 1808.) 
A brief description is given of this mineral which occurs with the 
rich telluride deposits of Kalgoorlie in crushed and foliated quartz por- 
))hyry dykes. Among the tellurium minerals is an iron black mineral 
with a specific gravity of 8.791. It is massive and has a sub-conchoidal 
fracture. An analysis shows: 
Mercury 10.86 
Gold 20.72 
.Silver , 30.g8 
Copi^er 05 
Sulphur 13 
Tellurium 37-26 (by difference). 
100.00 
From this analysis HgAu^AggTeg is calculated as the empirical for- 
mula. The kalgoorlite occurs associated with pale yellow calaverite. 
U. S. G. 
Catalogue of the Tertiary Mollusca in the Department of Geology, 
British Museum {Nat. Hist.). Pt. i. The Australian Tertiary Mo this 
ca. By George F. Harris. (8vo; xxvi and 407pp., 8 pis.; London, 
1897.) ' 
The catalogues published by the trustees of the British museum 
generally contain much more than their titles imply. In them will 
often be found some of the latest applications of the laws of evolution 
and the elucidation of new and important principles of morphology. 
Discussions of this nature have added value and weight from the 
intimate association of specimens and ideas, for usually curators 
of collections and custodians of ideas are too frequently dissociated. 
It is, therefore, a wise policy to engage the services of the highest 
talent in the preparation of the catalogues or reports on various col- 
lections or classes of organisms. 
Thirteen volumes on fossil vertebrates, eight on fossil inverte- 
brates, and three on fossil plants have already been published in 
this series. an3 Dr. Woodward states that thirty volumes more will 
be needed to include the remainder of the plants and Mollusca, the 
whole of the Brachiopoda, Annelida, Arthropoda, Echinodrr/nata, 
and Ccelenterata. 
The present catalogue of the 'Tertiary Mollusca of Australasia" is 
based upon the study of large collections, especially rich in well- 
