RECORDS OF MEETIXGS 407 



The Secretary then reported the death, on 24 January, 1915, of Arthur 

 Auwers^ Honorarj^ Member of the Academy since 1898. 

 The Academy then adjourned. 



Charles P. Berkey^ 



Secretary pro tetn. 



SECTIOX OF GEOLOGY AXD MIXERALOGY 

 1 March, 1915 



Section was called to order at 8 :20 p. m., Vice-President Charles P. 

 Berkey presiding, about twenty members and visitors being present. In 

 the absence of the Secretary of the Section the minutes of previous meet- 

 ing were not called for, and ]\Ir. W. S. Smith was appointed Secretary 

 pro tern. 



There being no business to transact, the following scientific programme 

 was offered: 



Mrs. C. C. Mook, A ]^ew Cephalopod from the Siluric of 



Pennsylvania. 

 Miss Marjorie O'Connell, Characteristics of a Typical Estuary. 

 A. W. Grabau, Xew Light ox Ancient Geography from 



THE Pocks and Fossils of Michigan. 



Summary of Papers 



Mrs. Mook reported the finding of a specimen of Trochoceras gro- 

 vaniense and exhibited the specimen. Dr. Grabau remarked on the im- 

 portance of the contribution. 



Miss O'Connell presented charts and maps to illustrate the importance 

 of salinity on fauna, concluding that no such thing as a peculiar estuarine 

 fauna existed. Miss O'Connell used the Baltic as an example of a typical 

 estuary, a point that was questioned by Dr. Johnson, who was in turn 

 answered by Dr. Grabau. 



Dr. Grabau 's paper was presented as a further step in a study already 

 occupying some ten years. It included a development of the varying 

 relations between land and water in Lower Siluric and succeeding periods, 

 with particular light on the paleogeographic conditions in Monroan time 

 as shed by recent studies of ^Michigan fauna. ^lany maps were used and 

 a concise and extremely scientific summary was read. Dr. C. A. Peeds 

 asked regarding sources of information. 



The Section then adjourned. AYvrrex S. S:\riTH. 



Secretary pro tern. 



