June, 1846. ] 7 5 



The Committee on the following description of a new species 

 of Unio, by Mr. Haldeman, read at last meeting, reported in 

 favor of publication. 



Description of Unio abacoides, a new species. 

 By S. S. Haldeman. 



Shell subovate, obtusely and regularly rounded posteriorly, disks 

 approximate, chestnut brown and pale green, with green radiating in- 

 terrupted capillary lines, and a tendency to form a submedial nodulous 

 ridge: primary teeth robust, their inner margin nearly at right angles 

 with the short lamellar teeth : pallial and muscular impressions well 

 marked : nacre white, roseate posteriorly. 



Length 2|, height 2, diameter 1& inches. 



Allied to U. dromas, Lea, and U. intermedius, Conrad, but is pro- 

 portionally longer than either. In its outline and small transverse 

 diameter it resembles U. abacus. I am indebted for this interesting 

 shell to the liberality of Dr. Foreman, who received it from Eastern 

 Tennessee. 



The Monthly Report of the Corresponding Secretary was read 

 and adopted. 



The Society then unanimously conferred a Life-Membership 

 on Richard C. Taylor, Esq., of this city. 



Dr. Morton offered the following : 



Whereas, Dr. Thomas B. Wilson has purchased the magni- 

 ficent collection of Birds called the Rivoli collection, now in 

 Paris, embracing 10,000 specimens, mounted and named, and 

 Dr. Wilson having expressed a wish that they should be arranged 

 in the Hall of the Academy, and his fellow members warmly and 

 cordially seconding his proposition, it is hereby 



Resolved, That a committee of five members be appointed to 

 devise such additions to the present building as may be necessary 

 for this purpose, and to report a plan of the same to the Academy 

 without delay. 



The preamble and resolution were unanimously adopted, and 

 the Committee appointed to consist of Dr. Morton, Mr. Vaux, 

 Dr. Bridges, Mr. Pearsall and Dr. Wilson. 



