464 SHELLS. 



Bechei, Adams and Reeve) was obtained by the dredge 

 from the same locality, and in the straits separating Korea 

 from the island of Kiusu, one of the Japanese group, a 

 specimen of the remarkable Fusus pagoda, together with 

 several scarce Nuculce and some Murices, among which 

 was a magnificent new one I propose naming in honour 

 of Sir William Burnett, were procured. The rocks of the 

 Korean islands were covered with a large kind of Mono- 

 donta which boiled with a little salt, were excellent eating; 

 adhering to the stones was &Mytilus, which, when masti- 

 cated, was of a peppery taste; and the mud-flats in the 

 neighbourhood of fishing-wears, were covered with the 

 Cardium Sinense, and a species of BuUaa; while the rare 

 Lingula tumidula, Reeve, was found buried a little below 

 the surface. 



The Cryptostoma generally inhabits very deep water. 

 It is cautious and timid in the extreme, contracting its 

 body on the slightest touch. When, however, it fancies 

 itself secure and unobserved, it gradually expands its 

 shapeless form, protrudes its long large foot, and explores 

 the surface on which it crawls, with a small finger-like 

 process, in the manner of a leech before fixing itself. It 

 progresses with a tardigrade movement, sliding like a 

 Limax, on its ventral disc, the short tentacles exserted, 

 and the posterior lobes of the mantle dilated. It is 

 closely allied to Natica in every particular. 



The Eburna is leisurely in its movements, exserting its 

 tentacula and crawling with a slow and measured pace. 

 It is, however, quick and rapid, when alarmed, in perceiv- 

 ing the enemy, and immediately retracts the soft parts 

 within the shell. Swainson states it has no operculum, 



