NUCITLA. 



liave not ventured to take such a step, for we much fear 

 that it would prove equally necessary to constitute a third 

 for the reception of the N. lanceolata, tellinoides, and 

 oblonga, which were unknown to Leach. 



Our English species are N. rostrata of Mont, not of 

 Lam. N, minuta, N, tenuis, Mont, and N. margaritaceao 



