345 



September 5, 1860. 



The President in the Chair. 



Dr. A. A. Hayes, on presenting a " Report on Supply- 

 ing the City of Charlestown, Mass., with Pure Water," 

 made some additional observations on the analyses of 

 the water, and on the phenomena connected with the 

 tides at Mystic Pond. 



Mr. Temple Prime, of New York, presented a paper 

 entitled : 



Synonymy of the species of Cyrenella, a genus of 



MOLLUSCA belonging TO THE FAMILY OF THE LuCINl- 



TiM. By Temple Prime. 



Cyrenella, Deshayes. 



Venus, Desh. Coq. Foss. Par. 1824. Cyrenella, Desh. 

 Soc. Philom. 1833. Cyrenoida, Joannis. Mag. Zool. 1835. 

 Cyrenella, Desh. Loc. sup. cit. 1835. Cyclas. Per. Cat. 

 20, 1837. Cyrenoides, Morelet. Test. Cub. 1851. 



1. Cyrenella alata, Adams. 



Cyrenoida alata, Adams and Reeve. Voy. Samarang, 80, pi. 

 xxiv. f. 12, 1850. Hab. Corean Archipelago. 



2. Cyrenella Americana, Morelet. 



Cyrenoides Americanus, Morelet. Test. Nov. Cub. pt. 2d, 26, 

 1851. Hab. Central America. 



3. Cyrenella Corei^nsis, Adams. 



Cyrenoida Coreensis, Adams and Reeve. Voy. Samarang, 80, 

 pi. xxiv. f. 14, 1850. Hab. Corean Archipelago. 



4. Cyrenella Cumingi, Sowerby. 



Cyrenoida Cumingi, Sowb. Hani. Wood's suppl. Cat. pi. xv. 

 f. 5, 1854. Hab. Philippines. 



