PLATE Xill. 



\ V, ^ 



!lW 





^.B. Sowerby. . 



1. Lutrai-icL oblouoa. 



'i. Solen Ipo'umen. 



.'V S . pellucid us. 



■jJon.I'ubl/.shf-d /:y .Joh.n Vaayoorsi.ittiS . 



