Reviews—Dr. Penck— Glaciation of the German Alps. 177 
Modiola aquiplicata, von Strombeck, Trigonia variegata, Cred. 
(variety, if not a synonym of T. gibbosa, Sow.), Corbicella Pellati, 
Lor., Pleuromya tellina, Ag., together with such univalves as Melania 
attenuata, Sow., Paludina Remeri, Dkr., and Valvata helicoides, 
Forbes, evidently pointing to a higher horizon. It is clear from the 
lists both of this and the previous work that the Hanoverian Upper 
Portland has but little in common with the more regular marine 
Portlands of England. 
Geologists and paleontologists alike are indebted to Herr Struck- 
mann for the care and fidelity with which he has worked out the 
stratigraphical position of the numerous fossils so well figured and 
described. He is in fact doing for his own district what De Loriol 
and Pellat achieved for the Boulonnais, and the valuable information 
thus obtained cannot fail to be of great assistance to Jurassic geolo- 
gists in this country. W. H. H. 
III.— Die VerRGLETSCHERUNG DER DEUTSCHEN ALPEN, IHRE URSACHEN, 
PERIODISCHE WIEDERKEHR, UND IHR HINFLUSS AUF DIE BopEn- 
GESTALTUNG. Gekronte Preisschrift von Dr. Atsrecur Prnox, 
Privatdocent an der Universitat Mtinchen. Mit 16 Holzschnitten, 
2 Karten, und 2 Tafeln. Svo. pp. 488. (Leipzig: Barth, 1882. 
London: Tribner & Co.) 
Tur GLACIATION OF THE GERMAN ALPS; ITs CausEs, PERIODICAL 
RETURN, AND ITS INFLUENCE ON THE CONFIGURATION OF THE 
Surrace. Prize Essay by Dr. Atsrucut Prncr, of the Uni- 
versity of Munich. With 16 Woodcuts, 2 Maps, and 2 Tables. 
O this treatise the Philosophical Faculty of the University of 
Munich awarded the prize for the best competitive essay on the 
subject of “ A thorough Description of the Diluvial Glacial Forma- 
tions and Phenomena in the Region of the South Bavarian High 
Plateau, and also in the Bavarian Alps.” ‘The author is already well 
known to all students of Glacial Geology from his investigations 
in the Glacial strata of North Germany and Scandinavia, and this 
present work contains not only a complete description of all the 
effects of ice action which now remain in the portion of the German 
Alps above mentioned, but also a comparison of the phenomena 
there displayed with those of North Germany and Scandinavia, and 
a consideration of the still-contested questions of the recurrence of 
glacial periods, and the erosive power of glaciers. 
The subject is treated under three different sections—(I.) The 
Last Glaciation of Upper Bavaria and North Tyrol; (II.) The Older 
Glaciations of the same districts; and (III.) The Formation of the 
Upper Bavarian Lakes. 
In the first division, which comprises 16 chapters, the author 
begins with an orographical sketch of the glaciated districts of South 
Bavaria and the Tyrol, and remarks that this Hastern division of the 
Alps is characterized by numerous well-defined longitudinal valleys, 
which run between the central chain composed of crystalline schists, 
and the northern chain of calcareous rocks. Only in three places 
DECADE II.—VOL. X.—NO. IV. 12 
