Bihliographical Notices. 87 



on the fossil plants from the Lignitic shales, and points out their 

 " Miocene " characters, as compared with other fossil flora) of North 

 America and Europe ; but, seeing that llcptiles of Mesozoic types 

 are associated with them, that Baeulites and Inocerami occur also 

 in the Lignitic series, and that a similar fossil flora occurs with 

 "Cretaceous " marine animal remains in both Dakota and Vancouver, 

 he declines to assign these transitional beds to a definite systematic 

 period, unless it be Lower Eocene, when the " Cretaceous " fauna 

 would thus seem to have persisted in the sea, whilst the land Avas 

 becoming covered with a new flora. He enumerates : — Fllices, 2 ; 

 Equisetacece, 2 ; Coniferce, 3 ; Monocotylcdones, 4 ; Dicoti/ledones, 15. 

 Several fossil woods examined by the microscope are also described 

 and illustrated. 



The fossil plants above mentioned came — some from " Porcupine 

 Creek," agreeing with the " Fort-Union group " of Nebraska, and 

 others from "Great Valley," more nearly corresponding with the 

 "Green-River group." The shales of the first of these groups, at 

 Milk River, yielded fragmentary remains of several Dinosaurs, Tor- 

 toises, and Gar-fishes, determined by Prof. Cope, in Appendix B, as 

 Cionodon steno2>sis, Madrosaui'us'? , Trioni/.v var/ans(^?), Trionijx sp.(?), 

 Plastomenus costatus, PL coalescens, Comjjsemijs ogmius, C. ? victus, 

 CJastes, sp. 



The Report has a good Index. It is well printed, and is illustrated 

 throughout with numerous careful sections, mostly copied bj^ " photo- 

 engra;ving" from pen-and-ink sketches by the author. 



Geology of Indiana. 



Fifth Annual Rt'iwrt of the Geological Surveg of Indiana, made 

 daring the year 1873, by E. T. Cox, State Geologist, assisted by 

 Prof. John Collett, Prof. W. W. Borden, and Dr. G. M. Le- 

 VETTE. 8vo, 494 pages, with maps, views, and sections. India- 

 napolis, 1874. 



In continuation of former Reports (noticed in the 'Annals,' July 

 1873), Mr. E. T. Cox and his assistants present the results of their 

 further surveys in Indiana. Rich in coal and iron, this region 

 demands the attention of metallurgists, as the chief portion of the 

 Report satisfactorily shows. Indeed in the interest of the Ameri- 

 can iron-workers, Reports, by Mr. Hartmann, on the Exhibition of 

 coal and iron at the Universal Exposition at Vienna, on the Iron 

 and Steel Industries of Rhenish Prussia and Westphalia, with a 

 map, and on the manufacture of Spicgeleisen (pp. 5-101), precede 

 the Geological Report of Indiana. This latter continues to give 

 careful details of local geology, notices of aU minerals and stones 

 of commercial value, and of the manufactures and agricultural 

 resources. The Antiquities, some of the most remarkable in the 

 world, are not neglected ; for frequent mention is made of the Mound- 

 builders and of their shell-heaps, tools, and extensive works. At a 

 bend of the Wabash River, in Posey County, an isolated bank. 

 ' 35 feet high, overhangs the river, which has eaten it half away 



