SCALARTIDiE. 51 



Section Acrilla, H. Adams, 1860. 



Shell moderately thick, tuiritelliform; whorls united, with 

 very numerous filiform ribs, last whorl with subcarinated 

 periphery ; lip of aperture thin. 



Subgenus Constantia, A. Adams, 1860. 



Shell small, perforate or imperforate, oval, with elate spire; 

 whorls rounded, decussated b}' thin longitudinal plications and 

 revolving elevated lirte; aperture oval, margin free, continuous, 

 acute. 



Subgenus Crosseia, A. Adams, 1805, 



Sliell turbinate, umbilicated, white ; whorls convex, in contact, 

 cancellated, simple or with distant varices; aperture somewhat 

 produced and channeled in front; umbilicus surrounded and 

 restricted by a callus. Japan. 



Genus SCALIOLA, A. Adams, 1860. 



Shell turriculated, wJiorls in contact, without varices, agglu- 

 tinating to the surface minute particles of sand, etc. Animal 

 with elongated, cylindrical, annulated rostrum, eyes prominent, 

 black, foot short, oval, acuminated behind. Operculum corneous, 

 oval, subspiral, with subterminal nucleus. Japan. 



Genus FUNIS, Seeley, 1861. 



Shell turreted, thin ; whorls with lamelliform ribs, and usually 

 also with spiral strife, so as to produce a cancellated surface; 

 aperture ovate, margin thin, produced below. Characters inter- 

 mediate between Scalaria and Turritella. 

 F. elongata, Seely. Fossil in the Cambridge Greensand, 



England (Struct, and Syst. Conch., t. 67, f. 46). 



Genus EGLISIA, Gray, 1840. 



Shell imperforate, elongated, solid ; whorls numerous, rounded, 

 spirally grooved, with indications of longitudinal varices ; aper- 

 ture small, orbicular, columellar lip curved, thick, flattened and 



