464 Notices of Memoirs — United States Geological Survey. 



system. The fossils in these beds comprise, amongst others, Zitho- 

 strotion basaltiforme, species of Amplexus and Zaplirentis, and teeth 

 of Placoids, some of which are recognized as Lopliodus Icevixsimus, 

 Ag., and Copodus comutus, Ag. Resting on the conglomerates are 

 grey limestones with an abundance of Chonetes papilionacea, Phill. 

 In these, and the beds below, Productus giganteus is conspicuously 

 absent, whilst it is extremely abundant in the limestone beds of the 

 series above. In the Belgian Carboniferous Limestone series there 

 are no conglomerates like those at Ingleborough, but at the base of 

 the limestones with Productus giganteus and P. cora, forming the 

 ' Calcaire de Vise,' there are some beds distinguished by the abun- 

 dance of Chonetes papilionacea, and between these and the Upper 

 Devonian strata there is a great thickness of beds containing Corals and 

 Placoid teeth, analogous to those in the Ingleborough Conglomerates, 

 and the authors therefore conclude, that these Lower Limestones, 

 beneath the Calcaire de Vise, are represented in part by the Yorkshire 

 Conglomerates, which are not more than about 180 feet in thickness. 

 On the other hand, the zone of Productus giganteus in the north of 

 Yorkshire attains a much greater thickness than in Belgium. 



G. J. H. 



IV. — Fifth Annual Report of the United States Geological 

 Survey, 1883-84. By J. W. Powell, Director. 4to. pp. 469, 

 58 Plates and 143 Figures. (Washington, Government Printing 

 Office, 1885.) 



T the beginning of this massive volume the Director of the 

 Survey gives an epitome of the work carried out, together 

 with the financial statement, from which it appears that the year's 

 expenditure for the Survey amounted to nearly 330,000 dollars, or 

 about £67,300. This is followed by brief administrative reports of 

 chiefs of divisions and heads of independent parties, from which 

 an idea may be formed of the extent and variety of the operations 

 included in the Survey. Thus, the chief geographer, Mr. Henry 

 Gannett, reports that topographical field work had been actively 

 carried on by different parties in Northern California, Arizona, New 

 Mexico, Montana, the Yellowstone Park, Massachusetts, the Denver 

 District of Colorado, and part of the Elk Mountains. The party 

 under the charge of Mr. Arnold Hague was engaged in working out 

 the geology of the Yellowstone National Park, and studying the 

 physics of geyser action in that district. Mr. T. C. Chamberlain 

 reports on the investigations made by himself and others under him 

 in tracing out the moraines and other glacial deposits in the upper 

 valleys of the Mississippi and Missouri, in Dakota, and also in 

 Illinois, Indiana, Ohio, and Kentucky. The division under Prof. 

 Roland D. Irving is engaged in a general investigation of the 

 Archaean formations of the North-western States, and its field of 

 operations extended from Northern Michigan to the country on the 

 north-west of Lake Superior. Dr. F. V. Hayden studied the relations 

 of the Laramie Group and other Cretaceous rocks, exposed between 

 the Missouri at Bismark, Dakota, and the Yellowstone at Glendive, 

 Montana. Mr. G. K. Gilbert and his assistants carried on their 



