178 Reviews — American Geological Surveys. 



through explorations carried on with characteristic ardour, and at 

 much cost and personal risk, by Samuel H. Beckles, Esq., P.E.S. 

 They occupy (with woodcuts) ninety -three pages of letter-press and 

 nearly the whole of four plates. The descriptions of these early 

 types of small Marsupial Mammals are founded almost entirely 

 upon the evidence afforded by lower jaws, not more than half a dozen 

 specimens being found in which the upper dental series are pre- 

 served, and no crania are as yet known. Above ten genera and 

 twenty-five species have been determined from the Purbeck beds, 

 Durdlestone Bay, Dorsetshire, and described by Professor Owen. 

 The plates have been most carefully and successfully drawn by Mr. 

 Alfred T. HoUick. 



AMEEICAN GEOLOGICAL SUEVETS. 



III. — First Annual Eepokt of the Geological Sxthvet of Indiana, 

 made during the year 1869, by E. T. Cox, State Geologist, as- 

 sisted by Professor Frank H. Bradlet, Dr. Euftjs Haymond, 

 and Dr. G. M. Levette. 8vo. pp. 240. Three maps and one 

 sheet of sections. (Indianopolis, 1869.) 



ALTHOUGH the result of little more than one year's work, this 

 first report of Professor Cox contains a great amount of 

 valuable information, and shows a zeal and earnestness of purpose 

 that augurs well for the future. 



The present volume contains reports upon Clay and Greene Coun- 

 ties, and the results of a reconnaissance made of Parke, Fountain, 

 Warren, and Owen Counties by Professor Cox ; and a report of Ver- 

 milion County, by Professor Bradley, etc. 



As the Geological Survey is intended to include the entire State, 

 attention is not confined to those counties in which coal and metalli- 

 ferous ores are found, and those less favoured with mineral wealth 

 are not neglected ; one of these, Franklin County, has been surveyed 

 and reported on by Dr. Haymond, and contains an account of the 

 Physical Geology, the General Geology (including a description of 

 the rock formations), Economic Geology (including the ores, building 

 stones, and all the useful minerals), timber, mineral springs. Palaeon- 

 tology, water power, ancient earthworks, bones of Mastodon, and 

 the soil and agriculture of the county. 



In addition to the purely Geological Surveys and Eeports, a great 

 deal of valuable information on the Natural History of the State has 

 been collected by Dr. G. M. Levette, who gives an interesting account 

 of the various Mammals and Birds found in Franklin County at the 

 present time. 



The Eeport is accompanied by separate maps of Greene County, 

 Clay County, and Vermilion County, upon which are clearly shown 

 the outcrops of coals, the sites of actual workings, as well as where 

 coal has been struck in borings or in well-sinkings ; the positions of 

 iron-ore, iron furnaces, stone quarries, etc. There is also a coloured 

 section of the geological formations from Green Castle to Terre Haute 



