RECORDS OF MEETINGS OF 1908 487 



upper formations are sometimes removed entirely or in part by the erosion 

 plane which separates the Coal-Measures from the Mississippian formations, 

 but when present are far more variable and show the results of control by 

 local factors during sedimentation. 



At present all we know concerning the age of these formations is based 

 almost entirely on the work of Professor C. L. Herrick. Fossils, when 

 present at all, are confined almost entirely to the upper half of the series. 

 The Logan at present is correlated with the Burlington and Keokuk for- 

 mations or Osage of the Mississippi Valley; the Black Hand and possibly 

 the upper part of the Cuyahoga, with the Kinderhook. Little is known of 

 the faunas of the lower half, as very few fossils have been found. From 

 collections made in the Ohio River, it seems likely that the Osage fauna 

 came in from the southwest and appeared at the point while the Kinder- 

 hook forms still Hngered in the central part of the State. 



Professor Crosby indicated the possible dependence of many pitting and 

 grooving effects upon an oscillatory movement of water and air. 



Dr. Kunz announced the death of Dr. E. S. F. Arnold and moved that a 

 committee be appointed to draft resolutions. The following were appointed 

 on this committee: Messrs. Kunz, Levison and Berkey. 



The Section then adjourned. 



Charles P. Berkey, 



Secretary. 



SECTION OF BIOLOGY. 



May 11, 1908. 



Section met at 8:15 P. M., Vice-President Chapman presiding. 



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



The following program was then offered: 



Frank M. Chapman, An Ornithological Trip to Southern Florida. 

 N. L. Britton, Recent Botanical Explorations in Jamaica. 



Marshall A. Howe, Some Types of Coralline Alg^. 



All of the papers were illustrated with lantern slides and a brief discus- 

 sion followed the reading of each, after which Mr. C. W. Beebe, of the 

 New York Zoological Park, gave a preliminary account of his recent ex- 

 pedition to Venezuela. 



The Section then adjourned. 



Roy W. Miner, 



Secretary. 



