fogy atid Mineralogy. 155 



II. Geology and Mineralogy. 



1. Report of the State Geologist^ of V w fork, for the year I 

 — Forty-second Annual Report Now York State .Museum Natural 

 History. Albany, 1889, pp. 351-490. This report and tlu.se of 

 the Director of the Museum, the State Entomologist, and the 

 State Botanist, included in the same volume, give evidence that 

 the spirit of scientific investigation that was developed during the 

 geological survey of 1886-'40 is still active and producing results 

 of high scientific value. The report under consideration, by Prof. 

 James Hall, should be in the hands of every working geologist 

 and paleontologist in America. 



A short sketcli of the contents of Vol. VII, of the Paleontology 

 of New York, is given with a synoptical table of the genera and 

 Species of Devonian crustaceans, and a list of the types in the pos- 

 session of the State Museum. An historical statement of the prep- 

 aration of Vol. VII. of the same work, on the genera of Brachiop- 

 oda, is presented, and followed by a most useful list of 207 

 genera of the Paleozoic Brachiopoda, prepared by Prof. J. M. 

 Clarke. 



A list, prepared by Mr. Charles Schuchert, of the fossils occur- 

 ring in the Oriskany sandstone of Maryland, New York, and 

 Ontario, exhibits 140 species, 14 of which pass from the Lower 

 Helderberg into the Oriskany sandstone and from the latter, 54 

 species pass upward into the Upper Helderberg, or Corniferous 

 limestone. Of the 371 species of the Lower Helderberg fauna 

 3.75 per cent, only pass up into the Oriskany sandstone. A list 

 is given of the specimens originally arranged by Prof. E. 

 Emmons, as representatives of the Taconic System. 



Another important list is the record of locality numbers used in 

 labelling the specimens collected for the illustration of the paleon- 

 tology of the State of New York. A record is given to No. 730 

 and the list will be continued in the next report. 



A note, on the genus Bronteus in the Chemung Rocks of New 

 York, by Prof. J. M. Clarke, describes the discovery of a new 

 species, B. se/tescens, represented by a portion of the pygidium. 

 This is probably the latest recorded appearance of the genus 

 Bronteus (pp. 401-405). Professor Clarke also gives a list of the 

 species constituting the known fauna and flora of the Marcellus 

 epoch of New York. 



One of the most interesting papers in the report is that of Pro- 

 fessor Clarke on "The Hercynian Question." 



The Hercynian Fauna of the Northern Ilartz in Germany. — 

 A. Roemer (1843) regarded the fauna as Upper Silurian; subse- 

 quently the Cephalopod facies of the fauna was considered as 

 Devonian, and the Brachiopod facies as Silurian. I^eyrich (1867) 

 believed the two faunas of Roemer to be one, and suggested their 

 equivalence to Barrande's stages F, G, H, and their relation to the 

 Devonian; Kayser (1878) demonstrated their unity and Devonian 

 character ; in 1880 he regarded them as Lower Devonian, repre- 



