May, 1846.] 51 



Meeting for Business, May 26, 1846. 



Vice President Morton in the Chair. 



The Monthly Report of the Corresponding Secretary was 

 read and adopted. 



The Committee to whom was referred the following, re- 

 ported in favor of publication. 



C5> 



Descriptions of Two New Species of Fossil Uchinodermata, from 

 the Eocene of the United States. 



By Samuel George Morton, M. D. 



Genus Cidaris. 



C. Alahamensis. Compressed, pentagonal, the angles rounded 

 so as to form a ten-sided figure. Ten rows of tubercles, with 

 nine or ten in each row. Ambulacra arranged in five pairs, 

 with delicate, slightly oblique fissures separated by a double ele- 

 vated line. Surface between the tubercles and ambulacra finely 

 granulated. 



Genus Galerites. 



G. ? Agassii. Elevated, hemispherical, with four pairs of am. 

 bulacra which diverge from the apex and meet at the margin, 

 having each two rows of pores connected by transverse fissures. 

 Surface marked by numerous, distinct granulations, which are 

 continued over the whole base of the fossil. 



I have much pleasure in dedicating this remarkable species to 

 M. Louis Agassiz, whose profound researches into this class of 

 organized beings have thrown much new light on their structure, 

 affinities and geological relations. 



Both these fossils were found by Dr. Albert Koch, in the Eocene 

 strata of "Washington Co., Alabama, and by him politely submit- 

 ted to me for description. 



