Geology and Natural History. 399 



and sometimes in another, swept the calcareous mud back and 

 forth, piling it up in the eddies in lenticular heaps or building it 

 up in obliquely-bedded masses over areas of considerable extent. 

 The oblique beds observe no regularity with respect to either the 

 angle or direction of dip. Within comparatively short distances- 

 they may be found inclining to all points of the compass." 



9. Geological History of the Chautauqua (JV. IT.) Grape Belt ; 

 by R. S. Taer. — Under this title, Bulletin 109, of the Cornell Uni- 

 versity Agricultural Experiment Station, publishes some topo- 

 graphical and structural facts regarding the land bordering the 

 eastern end of Lake Erie, which will be of interest to students of 

 surface geology. 



10. Geological Literature. — The assistant librarian of the Lon- 

 don Geological Society has prepared a second pamphlet under the 

 above title, containing a list of the geological literature added to 

 the library during the year ending December 31, 1895. It con- 

 tains a full subject index as well as list of titles of papers 

 arranged alphabetically by authors. Although not exhaustive 

 (15 V pages), it is a convenient reference catalogue. 



11. Norges Geologiske Unclersogelse. — The following are recent 

 publications from the Geological Survey of Norway : 



No. 10. Tagskifere, heller og vekstene; af Amund Helland. 



No. 11. Lagfolgen pa Hard anger vidda ogden sakaldte " bojfjeldskvarts ; " 

 af W. C. Brogger. 



No. 12. Norges granitindustri af Carl C. Ruber. 



No. 13. Gausdal. Fjeldbygningen inden rektangelkartet Gausdals omraade ; 

 af K. 0. Bjorlykke. 



No. 14. Aarbog for 1892 og '93; udgivet af Dr. Hans Reusch, undersogelsens 

 bestyrer. 



No. 15. Dunderlandsdalens jernmalmfelt (i Ranen, Nordlands amt, lidt sonden- 

 for polarkredsen) ; af J. H. L. Yogi. 



No. 16. Jordbunden i Jarlsberg og Baraks amt; af Amund Helland. 



No. 17. Nissedalens jernmalmforekomst (i Thelemarken); af J. H. L. Vogt. 



12. Eruptionsfolge der triadischen Eruptivgesteine bei Predazzo 

 in Sildtyrol ; von W. C. Brogger. (Vidensk. Skrift. i Math, 

 natur. Klasse, Kristiania, 1895, 8° 183 pp.) — In this publication, 

 which is part |cvo of the series (part I, Grorudit-Tinguait Serie) 

 by Prof. Brogger on the eruptive rocks of south Norway, the 

 author mentions that having undertaken an expedition into South- 

 ern Tyrol — a region classic in geological history — for purposes of 

 study and comparison, he has been led to publish his observations 

 and to draw some general conclusions from them. 



He first shows that " the typical rocks of Monzoni and Predazzo 

 are not syenites, nor are they diorites (or diabases or gabbros) but 

 monzonites. They form a well-characterized and particular group 

 of rocks, which are distinguished by the fact that they occupy an 

 intermediate position between the alkali-orthoclase rocks on the 

 one hand and the plagioclase rocks, rich in lime and poor in alkali, 

 on the other. The monzonites are sharply defined orthoclase- 

 plagioclase rocks." The relations are shown in the following 

 table, where the monzonite group is inserted between the alkali 

 series and the lime series. 



