18 



Additions to the Library. 



A Report on American Coals, and their comparative power 

 and efficiency in generating Steam, and for other purposes. By 

 Prof. Walter R. Johnson. 8vo. Washington. From Hon. R. C. 

 Winthrop. 



A Final Report on the Geology of New Hampshire. By Dr. 

 C. T. Jackson. 4to. 1844. From the Author. 



A Public Discourse, in Commemoration of Peter S. Du 

 Ponceau, LL. D., late President of the American Philosophical 

 Society, &c. &c. By Robley DungUson, M. D. Philadelphia, 

 1844. From the Society. 



Memoirs of William Maclure. By Samuel G. Morton, M. D., 

 &c. Philadelphia, 1844. From the Author. 



List of Specimens of Myriapoda in the British Museum. 

 18mo. London, 1844. From the British Museum. 



List of Specimens of Birds in the same. Part I. 18mo. 

 London, 1844. From the same. 



Catalogue of Tortoises, Crocodiles, and Amphisbseneans in 

 same. 18mo. London, 1844. From the same. 



January 15, 1845. 

 The President in the Chair. 



The President communicated a paper from Dr. J. W. 

 Mighels, of Portland, Maine, a Corresponding Member, enti- 

 tled " Descriptions of Shells from the Sandwich Islands, and 

 other localities." In this paper the author characterizes the 

 following species, which he supposes to be hitherto unde- 

 scribed. 



Helix intercarinata. Shell depressed, subdiscoid, brown, 

 mottled with a darker color ; umbilicus deep ; whorls five, con- 

 vex, with fine, raised incremental striae ; aperture semilunate, 

 with two thin, elevated, keel-like lamina3, placed longitudinally 



