156 Scientific Intelligence. 



the Penokee belt of iron-bearing and other beds, lying in Wis- 

 consin, next south of the Keweenawan series. It is made the 

 basis by them, along with the Keweenawan, of the pre-Cambrian 

 division of rocks called "Algonkiau ;" but in the closing para- 

 graph, it is stated, after remarks on the use of the term Huronian, 

 that the Penokee series is properly Huronian, if the latter term is 

 restricted to such water-deposited rocks as are proved to lie un- 

 conformably on a system of older crystalline rocks which are dis- 

 tinctively Archaean. The evidence of unconformability in the 

 case of the Penokee series appears to have been worked out with 

 great care. Many plates of rock slices, maps and stratigraphic 

 sections, illustrate the paper. Mr. Walcott's memoir has been 

 noticed in the last volume of this Journal. 



In the course of the Administrative Reports, Professor Shaler 

 states (p. 19) that he has discovered that the reefs of living coral 

 on the east coast of Florida have not their limit at Cape Florida, 

 as has been hitherto supposed, but extend many miles north; 

 that a distinct reef continues probably 10 or 12 miles beyond 

 Jupiter Inlet. 



Mr. Arnold Hague reports (p. 134) the discovery of a new hot 

 spring area, on the east side of the Yellowstone near the head of 

 Wapiti Creek. He also states (p. 135) that orpiment and realgar 

 have been found coating siliceous sinter in the Norris Basin, 

 Yellowstone Park. Mr. G. F. Becker attributes (p. 142) the ex- 

 terior form of the great granite domes of the Yoseniite to exfolia- 

 tion on a gigantic scale. 



The TJ. S. Geological Survey has also issued many new Bulle- 

 tins. No. 68, Earthquakes in California, by J. E. Keeler; No. 

 69, A Classed and Annotated Bibliography of Fossil Insects, S. 

 H. Scudder; 71, Index to the known fossil insects, including 

 Myriapods and Arachnids, idem ; 72, Altitudes between Lake 

 Superior and the Rocky Mountains. W. Upham ; 73, the viscosity 

 of Solids, C. Barns; 75, Record of N. A. Geology for 1887 to '89, 

 N. H. Darton ; 76, Altitudes in the U". S., 2nd. ed., H. Gannett; 

 77, Texan Permian and its Mesozoic type of fossils, C. A. White; 

 79, a late volcanic eruption in Northern California and its 

 peculiar lava ; J. S. Diller ; 80, Correlation Papers, Devonian 

 and Carboniferous, H. S. Williams; 81, Correlation Papers, Cam- 

 brian, C. D. Walcott; 82, Correlation Papers, Cretaceous, C. A. 

 White; 91, Record of N. A. Geology for 1890, N. H. Darton. 



2. Stratigraphy of the .Bituminous Coal Field of Pennsyl- 

 vania, Ohio and West Virginia y by Israel C. White. Wash- 

 ington, 1891. Bulletin No. 65 of the U. S. Geological Survey. — 

 This admirable memoir by Prof. White deserves more than the 

 passing notice usually assigned to such papers. It is an attempt 

 to correlate the groups and individual coal beds, which is so far 

 successful as to challenge respect from all who have spent much 

 labor within the area discussed. This bulletin is no mere com- 

 pilation of old work done by Prof. White and others ; it is an 

 actual revision of all that has been done, a great part of the 



