CYLICHNA. 321 



prominent point. Alt. 0'083 in., diam. 0*044. Mouth breadth at 

 same place 0'007 inch (Wats.). 



Tahiti Harbor, near the reefs, 20 fms. 



C. tahitensis WATS., Chall. Rep. Gastr. p. 665, pi. 49, f. 11. 



This is very possibly a young shell. 



C. FIJIENSIS E. A. Smith. Unfigured. 



Shell very much elongated, narrow, cylindrical, a little contracted 

 in the middle, white, transversely very finely striated, the striae 

 more distant toward the vertex, longitudinally striated with indis- 

 tinct growth lines. Vertex (which is surrounded by an acute mar- 

 gin) profoundly umbilicate ; base subperforate. Aperture very nar- 

 row above, dilated below ; columella a little thickened, spirally 

 twisted, joined to the apex by a thin callus. Alt. 6, diam. 2 mill. 

 (Sm.). 



Fiji Is. 



C.fijiensis SM., Ann. Mag. N. H. (4), ix, p. 352. 



A pure white shining species, of nearly the same form as C. bi- 

 plicata A. Ad., but rather narrower, with the columella only spiral- 

 ly twisted, and the transverse striae finer (Sm.). 



C. NITENS E. A. Smith. Unngured. 



Shell ovate, semi-pellucid, bluish- white, shining, longitudinally 

 indistinctly and transversely at top and base striated. Vertex 

 minutely umbilicated. Aperture narrow, dilated at base ; lip solid, 

 thick ; columella thick, provided with a small tooth or tubercle in 

 the middle ; umbilical region subperforate. Alt. 5, diam. 2-] mill. 

 (8m.). 



Fiji Is. 



C. nitens SM., Ann. Mag. N. H. (4), ix, p. 351. 



A small semitransparent bluish-white species, chiefly character- 

 ized by the thick labrum and columella which has a small tooth or 

 tubercle on the middle of it (Sm.). 



Var. : Shell larger, less solid ; alt. 6, diam. 3 mill. 



South African and South Atlantic Species. 



C. TUBULOSA Gould. Unfigured. 



Shell of moderate size, elongated, cylindrical, sensibly enlarged 

 above and below, whitish ; smooth or sculptured with revolving 



