Reports and Proceedings — Geological Society of London. 281 



tions ; besides the specimens of Konig's " Icones," bored rocks, 

 tracks, trails, footprints, cores from borings, etc. 



The descriptive paragraphs not only give details as to the localities 

 and peculiarities of the fossils, but are frequently rich with philosophic 

 thought on the relationship and probable descent of the animals 

 themselves. 



Each Part contains a plan and explanation of the saloons or 

 galleries and cases of those fossils of which it treats, also a good 

 index ; and is complete in itself. 



In thus endeavouring to popularize an abstruse but exceedingly 

 fascinating branch of science, and in giving to the public such a full 

 shilling's worth, the author (Dr. H. Woodward) and the Trustees ot 

 the British Museum are to be highly congratulated ; and we trust 

 that the public will show its appreciation of the work by rapidly 

 buying up the present edition, and thus enabling the author to issue 

 another edition incorporating some of the slight improvements we 

 have ventured to suggest. 



A list of the Museum Catalogues relating to Zoology and 

 Palaeontology, and of Guide-books for the Zoological, Geological, 

 and Mineralogical Departments, is added. 



IRIEIPOIRTS J^HT'lD IPIROCZEIEIDIEIsra-S. 



Geological Society of London. 



I.— April 16, 1890.— J. W. Hulke, Esq., F.R.S., Vice-President, in 

 the Chair. — The following communications were read : — 



1. " On the disturbed Rocks of North-western Germany." By 

 Prof. A. von Kdnen, For.Corr.G.S. (Communicated by Sir Waring- 

 ton W. Smyth, F.R.S., F.G.S ) 



After referring to the disturbances of Palaeozoic times, the author 

 commented upon the Miocene dislocations of the Harz, Ehineland, 

 Westphalia, and Nassau, which have a N.W.-S.E. strike, varying 

 to N.-S. or E.-W., and which are similar to post-Glacial dis- 

 locations. 



He briefly discussed the origin of these dislocations, and noticed 

 their peculiarities, and proceeded to consider the relationship of the 

 intruded basalts to the disturbances, supposing that during the 

 process of faulting, the earth's crust was pressed downward along 

 synclinal lines, and that the basaltic magma escaped upwards through 

 the inverted funnel-shaped synclinal fissure. 



Comparison was made between these Tertiary basalts and the 

 products of modern volcanic eruptions, and it does not appear to 

 the author to be unlikely that the cause of the outflow of many of 

 the lavas in the latter was similar to that which produced the exten- 

 sion of the Tertiary basaltic rocks. 



2 " On the Origin of the Basins of the Great Lakes of America." 

 By. Prof. J. W. Spencer, M.A., Ph.D., F.G.S., State Geologist of 

 Georgia. 



From the study of the hydrography of the American lakes, from 



