1868.] 



COMMANDER KNOCKER ON PELAGIC SHELLS. 



619 



(continued). 



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The Atalantas I have simply placed in separate columns, not 

 knowing their specific names, but with notes for guidance. 



Of the lanthinas I found several species ; one I submitted to Dr. 

 A. Adams, E.N., who informs me it is new (/. nitida), and has 

 kindly undertaken to describe it, together with another new shell I 

 procured*. 



* " Dear Captain Knocker, — I think the small lanfhina, which occurred some- 

 what abundantly in your cruise, is a new species, and, on account of its shining 

 ajipearance, may be named /. nitida. It belongs to the same section {lodea, 

 Mcirch) as does the pretty /. exigica ; but the whorls are more finely striated, and 



