Revieics — Dr. A. Fritsch's Permian Amphibia of Bohemia. 521 



The '•' Hill Gravels " are next described ; these overlie the Boulder- 

 clay, where it occurs, and contain many fragments derived from it. 

 Much of the gravel is described as coarse and unstratified. Succeed- 

 ing these in point of time are the " Valley Gravels of the Early 

 Biver System." These are similar in composition to the Hill 

 Gravels, but are entirely separated from the Glacial deposits. 

 While they appear to have a distinct relation to the valley systems 

 in which they lie, yet in their lower prolongations in the Cam Valley 

 they stretch away almost at right angles to its present course. Still 

 their fluviatile origin remains conspicuous. The March gravels 

 which form little islands in the Fenland are described with these 

 valley gravels, although they contain marine shells. Their con- 

 nexion is not discussed. Prof. Bonney and Mr. S. V. Wood, jun., 

 hold them to be coeval with the older ( Cyrena fluminalis) gravel of 

 Barnwell. 



The " Valley Gravels of the Present Biver System " are then 

 described ; the first determination of the waters towards which is 

 marked, according to Mr. Jukes-Browne, by the series to which the 

 Barnwell gravels belong. 



A short chapter is devoted to the correlation of the Cambridge- 

 shire drifts with those of the Eastern Counties. Mr. Jukes-Browne 

 is not satisfied with the evidence brought forward by Messrs. Wood 

 and Harmer to make an unconformity between the Lower and 

 Middle Glacial deposits of East Anglia ; indeed he suggests that the 

 Cromer Till, Contorted Drift, and Middle Drift might be bracketed 

 together as Lower Glacial ; and the Chalky Boulder-clay and over- 

 lying Plateaux or " Cannon-shot " gravel, as Upper Glacial. This 

 view, which considerably simplifies the geology of the Eastern 

 Counties, is one in which we cordially agree. 



From the title of the work it might have been expected that 

 descriptions of the Alluvial strata of the Fenland would have been 

 included ; this, however, was considered to be beyond the scope of 

 the subject proposed. 



IV. — Amphibians from the Permian Books op Bohemia. 1 

 E. ANTON FEITSCH, whose important works on the fossils of 

 the Cretaceous formation in Bohemia are well known, has com- 

 menced to publish, with the assistance of the Imperial Academy of 

 Vienna, a Fauna of the Coal and Limestone of the Bohemian rocks 

 of Permian age, of which the first part is just issued. This mono- 

 graph, which, when completed, will extend over three volumes, will 

 rank as one of the most important modern contributions to Palaeonto- 

 logy, on account of the large number of new and singular types of 

 life which it describes and makes known by splendid illustrations. 

 It is essentially a descriptive work, and the author treats his subject 

 rather from the zoological point of view than that of the comparative 

 anatomist. 



1 Fauna der Gaskohle und der Kalksteine der Permformation Bohmens, von Dr. 

 Ant. Fritsch, A 0. Professor der Zoologie an der Universitat in Prag. Band 1. 

 Heft I. (Prag. 1879.) 



