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alone are present besides the rare Pterygotus" (245, 9). (See sketch 

 map, fig. 14.) 



While Alth's paper is undoubtedly excellent for the general strati- 

 graphy and palaeontology of Galicia and Podolia, involving as it does 

 not only the results of his own studies but also those of the earlier 

 investigators, it yet fails to give just the details which are essential 

 for the problem in hand. It helps us very little to know that the 

 eurypterids and a large number of the fossils are found in beds some 



Fig. 14. Sketch Map of Parts of Galicia and Podolia, Showing Localities 

 where eurypterlds have been found 



i, Studzienica; 2, Kitaigorad; 3, Kameniec podolski; 4, Zawale; 5, Zalesczyki. 



25-30 feet thick; the important fact is whether or not they occur in 

 thin bands, isolated from the remaining fossils as is the usual way. 

 It must in fairness be stated that Alth's section on the Upper Siluric 

 beds, or as he called them, the "compact and bituminous limestones," 

 does not pretend to be more than a resume of the important but little 

 known works by Barbot, de Marny and Malewski, written in Russian, 

 but now made available through this careful German summary. 

 Schmidt's statement has shown that the mode of occurrence above 



