COCHLOSTYLA-CORASIA. Ill 



sharp within ; aperture large, oblique, subovate ; peristome not con- 

 tinuous, white, slightly reflected, the upper margin nearly straight, 

 not flexuous. (Any.) 



Alt. 14, greater 26, lesser 18 mill. 



New Georgia, Solomon Is. 



H. (Corasia) psyche ANGAS, P. Z. S. 1869, p. 624, t. 48, f. 1. 



This species, which I have received from Dr. James Cox of 

 Sydney, New South Wales, is somewhat intermediate between H. 

 aphrodite Pfr. and If. purchasi Pfr. It differs from the former in 

 being much flattened above and very ventricose below, and especi- 

 ally in the form and amplitude of the aperture, and from the latter 

 in texture, form of spire, color, and size. (Ang.) 



C. BALCOMBEI Cox. PI. 23, fig. 15. 



Shell imperforate, depressed, almost flat above, convex below, very 

 thin, glossy, pale straw-colored, coarsely striated above and below 

 with regular oblique transverse stria?, and longitudinally with 

 strongly marked very slightly waved striae, giving by their decussa- 

 tion a granular appearance to the surface of the shell ; spire scarcely 

 raised, suture impressed; whorls 4, slightly convex above, rapidly 

 increasing in size ; last whorl inflated below, and very prominently 

 and sharply keeled, the keel edged with an opaque white line; base 

 rounded ; aperture large, subtrapezoidal, acutely angled at the 

 periphery ; peristome slightly thickened and everted, upper margin 

 attached to the carina of the last whorl ; columella dilated, appressed, 

 and indented over the umbilical region. (Cox.) 



Alt. O48, greater diam. 1'09, lesser 0'7S inch. 



Solomon Is. 



H. (Corasia) balcombei Cox, P. Z. S. 1873, p. 565, t. 48, f. 4. 



C. TRICOLOR Pfeiffer. PL 23, figs. 1, 2, 3, 4, 5, 6. 



Shell imperforate, depressed, thin but rather solid, acutely keeled 

 at the circumference; translucent-whitish, having numerous close 

 spiral lines of opaque white above and below, the keel opaque white 

 bordered with lines of brown and articulated with brown dots ; lip 

 brown. 



Surface lightly obliquely striatulate, conspicuously closely and 

 finely spirally striated. Spire low, the apex flattened. Whorls 4, 

 the last wide, a little deflexed in front ; strongly contracted toward 

 the aperture above and at the carina ; base more or less swollen or 

 gibbous around the columella. Aperture oblique, triangular; per- 



