418 ANNALS NEW YORE ACADEMY OF SCIENCES 



A. A. Julien, The Genesis of Antigoeite. 



Victor Ziegler, The Eavenswood Granodiorite. 



Charles P. Berkey, Glacial Modification of the Channels about 



New York. 



At 8 :30 in the evening, the regular session of the Section of Geology 

 and Mineralogy was held in the Academy room at the American Museum 

 of Natural History, Vice-President George F. Kunz presiding. 



The following programme was offered : 



Douglas W. Johnson, The Origin of the Yosemite Valley. 

 James F. Kemp, A Spheroidal Basic Dike from Arkansas. 



A. W. Grabau, Eelation of Middle and Upper Siluric in 



the Eastern United States. 



The following paper was read by title : 



Clarence N. Fenner, The Watchung Basalt and the Paeagenesis 



OF its Zeolites and Other Secondary Min- 

 erals. 



Summary of Papers. 



Professor Johnson discussed the gradients of the tributary streams and 

 showed that the present valley bottoms are 2200 to 2400 feet deeper than 

 would be expected from their behavior. The conclusion reached from all 

 sources of evidence is that the result is due to overdeepening by glacial ice. 



Professor Kemp showed several specimens, and the type of dike was 

 compared to others of spheroidal habit from different localities. 



Professor Grabau showed a series of typical geological sections in ex- 

 planation of the correlation proposed. 



The Section then adjourned. 



Charles P. Berkey, 



Secretary. 



SECTION OF BIOLOGY. 



May 9, 1910. 



Section met at 8 :15 p. m., Professor Bashford Dean presiding. 



The minutes of the last meeting of the Section were read and approved. 



The following programme was then offered : 



W. K. Gregory, Notes on the Insectivore Genus Tupaia and 



its Allies. 

 Henry E. Crampton, Fourth Journey of Exploration in the South 



Seas. 



