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AMERICAN JOURNAL 



species) projecting beyond the shell. The tentacles are long, 

 slender, delicately tapering, resembling those of the Neritinae. 

 The branchiae consist of a single, large pinnate, elongate gill, 

 attached by its base above the neck, lodged in a cavity ; when 

 protruded it stretches out beyond the margin of the shell, either 

 to the right or left, more usually to the latter side. The eyes 

 are immersed contiguous to the hinder bases of the tentacles. 

 The mantle is fringed with a series of minute tapering processes. 

 When the animal is in motion the margin of the mantle is turned 

 over on to the edge of the shell. 



SCUTELLINA GRANOCOSTATA, Pease. 



Description. — T. ovali, alba, radiatim granuloso-costata, granu- 

 lis rotundatis; transversim minutissime elevato-striata ; apice 

 postico, ad marginem extenso. 



Dimensions. — Long. 7J, diam. 6 mill. 



Hab. — Hawaii. 



Shell ovate, white, radiately granosely ribbed, granules 

 rounded, transversely minutely elevately striate; apex posterior, 

 extending to the margin. 



SCUTELLINA ACULEATA, Pease. 



Description. — T. orbiculari, elevata, nodulis aculeatis obducta, 

 striis elevatis tenuiter decussata, ad apicem concentrice lirata ; 

 apice postico ; flavescente, apice rufescente. 



Hab. — Hawaii. 



Shell orbicular, elevated, covered with small prickly nodules 

 and very finely decussated with raised striae, concentrically 

 ridged towards the apex ; apex posterior, not extending to the 

 margin. Yellowish, apex reddish. 



Melampus strtatus, Pease. — Plate 12, fig. 14. (Proc. Zool. 

 Soc. London, 1861,) 



Description. — T. elongato-ovata, solida, imperforata, fusca : 

 spira brevis, mucronata, granulosa ; anfr. ultimo, transversim 

 striata, interdum striis longitudinalibus ruguloso ; columella tri- 

 plicata, labro bilamellato. 



Dimensions. — Long. 10, diam. 5 mill. 



Hab.— Tahiti. 



Shell elongate ovate, solid, imperforate, brown ; spire short, 

 mucronate, granulose ; last whorl transversely striate, in mature 

 specimens the strioe are distant, sometimes disappear altogether 



