116 PROCEEDINGS OF THE ACADEMY OF 



CATALOGUE OF THE FAMILY CHAMIDJE. 

 BY GEORGE "W. TRYON, JR. 



Family CHAMID.E, Swainson. 

 Man. Malacol, 374. 1840. 

 Genus CHAMA, Linn. 

 Syst. Nat. Edit. x. 1758. 



The subgenus Arcinella, of Schumacher, adopted by H. & A. 

 Adams, has no systematic value, the peculiarities on which it is 

 founded, recognizable at once in the t} 7 pe species, so fade away 

 through the series of species that no distinct line of demarcation 

 remains. The species of Chama are very difficult, owing to irre- 

 gularit}' of growth, sculpture, and coloring, and I am convinced 

 that the comparison of large suites of specimens would result in 

 a wholesale reduction of the species. Some of the earlier species^ 

 described by Linnreus and Lamarck, cannot be identified with 

 an}^ certainty at this dajr. 



1. C. aeruginosa, Lamarck. 



(not identified.) 



2. C. arcinella, Linn. Syst. Nat. Ed. xii., 1139. Reeve, Icon. 



sp. 26. 1846. 

 Arcinella spinosa, Schum. Essai, Nov. Gen. 142. 1817. 



West Indies. 



3. C. aspersa, Reeve, Icon. sp. 24. 1846. 



Philippines. 



4. C. brassioa, Reeve, Icon. sp. 31. 1847. 



Scarcely distinct from C. Pacifica. 



Philippines. 



5. C. Buddiana, C. B. Adams, Panama Shells, 253. 1852. 



Panama. 



6. C. Cardit/Eformis, Reeve, Icon. sp. 33. 1847. 



Hab. ? 



7. C. cistula, Reeve, Icon. sp. 51. 1847. 



C. appressa, Reeve, Icon. sp. 55. 1847. 



Honduras. 



