36 



8ILTQUARIA. 



S. vitis. PI. 18. fig. 9. 



Shell irregularly spiral towards the top, with slightly ele- 

 vated longitudinal lines ; fissure narrow. Greatest diameter i 

 of an inch. 



Locality, Claiborne, Alab. 



Cab. Acad.N. S. 



CYTHEREA. 



. f l. C. Poulsoni. PI. 19. fig. 1. 



Shell ventricose, cordate, with fine concentric striae ; beaks 

 prominent, curved towards the lunule, which is heart shaped : 

 cavity of the beaks very deep. Diameter about 2 inches, the 

 length aud breadth being nearly equal. 



The beaks are not unlike those of Isocardia, and the shell 

 resembles C. Sayana, (nobis) but the latter wants the concentric 

 striae. I dedicate this shell to my kind friend, Mr. Charles A. 

 Poulson. 



Locality, Claiborne, Alab. 



Cab. Acad. N. S. 



2. C. Hydana. PI. 19. fig. 2. 



Shell subtriangular, inequilateral; posterior side slightly 

 channelled ; posterior end cuneiform ; lunule lanceolate, ellip- 

 tical. 



I gladly name this fine species in, compliment to Mr. Wil- 

 liam Hyde, one of the most successful and zealous cultivators 

 of American Conchology. Length 2 inches. Breadth H 

 inches. 



Locality, Claiborne, Alab. 



Cab. Acad. N. S. 



3. C. (pquorea. PI. 19. fig. 8. 



Shell subovate, inequilateral, compressed, with regular, dis- 

 tinct concentric sulci; lunule cordiform, two cardinal teeth 

 in the right valve, parallel and approximate. Length If inches. 

 Breadth li inches. 



Locality, Claiborne, Alab. 



Cab. Acad. N. S. 



[68] 



