Association of American Geologists and Naturalists. 119 



Mr. Hall requested to be excused from reading his report on 

 Zoophytes at the present meeting, and to have hberty to con- 

 tinue his labors to another year ; which was granted. 



After the recess, Dr. John Locke read a paper on the more im- 

 portant fossil remains of the country west of the Alleghanies. 



The Secretary then presented a communication and letter from 

 Prof. J. H. Alexander of Baltimore, accompanied by a meteorolo- 

 gical register kept at that city from October, 1843, to May, 1844, 

 in which some points not usually observed were noted. 



Prof. J. W. Bailey exhibited to the session, a drawing of a 

 perfect skull of Mastodon giganteum, found last year in Orange 

 county, N. Y. He also mentioned Ehrenberg's recent discove- 

 ries as to the organic origin of various rocks which possess the 

 oolitic structure, and requested that attention might be paid to 

 any evidence of such structure in our American rocks. 



Prof W. B. Rogers stated that for many years he had been 

 inclined to regard the oolitic structure of some of the Lower Ap- 

 palachian limestone and chert, as well as the carbon of limestones 

 of this country, as due to organic forms. He had been led to 

 this inference by the remarkable uniformity of the spherules in 

 the rocks, and from traces of what seemed to be septa and other 

 indications of structure in them. 



Adjourned to 4^ o'clock, P. M. 



Afternooji session. — Dr. H. King in the chair. 



il/r. C. H. Olmsted read a paper communicated by Mr. W. 

 O. Ayres, of East Hartford, Connecticut, on the identity of the 

 species of Cottus described by Richardson as the C cognatus, 

 by Haldeman as the C. viscosns, and by Dekay under the name 

 of Uranidea qiiiescens, with the Cottus gohio of Europe, Mr. 

 Ayres comes to the conclusion that they are all one species, and 

 the only fresh-water fish yet determined with certainty to be 

 common to the two continents. 



The Chairman then announced for Tuesday morning the ex- 

 hibition of an anemometer invented in this city. 



Dr. Douglass Houghton remarked on the publication of Dr. 

 D. D. Owen's survey of Iowa, now lying in manuscript in the 

 State Department in this city. He suggested that the Associa- 

 tion should make some representation to Congress recommending 

 its publication. 



Resolved, That the subject be referred to the committee appointed 

 this morning on geological surveys of the public lands. 



