74 AMERICAN JOURNAL 



session of such thorough catalogues of species as those pub- 

 lished by Dr. Meek, Mr. Conrad and Mr. Grabb. 



We do not agree with Dr. Meek in rejecting pre-Linn£ean 

 generic names. 



Proceedings Academy Natural Sciences, Philadelphia, No. 1., 

 January and February, 1864. 



Description of a new Genus of the Family Ilelanidae. 



BY ISAAC LEA. 



Meseschiza Orosvenorii, Wabash Kiver, Indiana. 



We have examined the specimens of this shell. They do 

 not appear to us to be mature. The pleurotomose slit in the 

 outer lip on the periphery, is a curious feature. 



Descriptions of eleven new species of Indigenous Melanidde: 



BY ISAAC LEA. 



Ooniohasis Emeryensis^ Rocky Creek, East Tenn. 

 " umbonata, Cumberland River. 



" Albanyensis, Baker Co., Georgia. 



" viridostriatus, Flint River, Georgia. 



Trypanostoma subrohiistum, Holston River. 



" Roanense^ Roane Co., East Tenn. 



" Lesleyi, E. Tenn., Pulaski Co., Ky. 



" affine, Cumberland River. 



" cyUndraceum, Roane Co., E. Tenn. 



" carinatum, Bull Run, East Tenn. 



Strepliobasis Lyonii^ Holston River. 



In this paper Mr. Lea proposes the genus Eurycselon for 

 a small group of species having a large ear-shaped aperture, 

 the columella with a callus above and truncate below; the 

 whorls noduled. To this group pertain G. umhonata, midas, 

 and Anthonyi, Anc. turhinata, crassa, and some few other species. 



Having described two new species of Goniobasis in 1861 

 under the names of blanda and Vanuxemii, both of which 

 were pre-occupied by himself for species originally described 

 as Melanlans but which now prove to be Goniobases, Mr. Lea 

 proposes to change their names to versa and Prestoniana re- 

 spectively. Goniobasis Ganbyi, Lea, having been previously 

 described by Mr. Reeve as G. EtowaJiensis, Lea, the name of 

 Ganbyi is transferred to the shell which Mr. Lea subsequently 

 described as Etoivahensis. 



Description of and Remarks on, Planor'bis ' Newherryi : by 



ISAAC LEA. 



For this species a new genus is proposed, Ifegasystropha ; 

 Mr. Binney's name Garinifex, however, has priority. 



