106 HALIOTIS. 



excavated, six or seven perforations open ; dark green, marbled with 

 red, interior whitish. (Reeve.) 



Habitat unknown. 



H. marmorata Gray in Reeve, Conch. Icon., f. 44 (not H. mar- 

 morata Linn.). — H. Grayana Sow t erby, Thes. Conch, v, p. 20, f. 87, 

 111. 



Probably closely allied to H. diversicolor, but the lip seems to be 

 continued a greater distance around the spire. 



H. glabra Chemnitz. PI. 9, fig. 50 ; pi. 12, fig. 63. 



Shell oval, depressed, marked with arrow-shaped olive or green 

 spots on a lighter ground ; surface nearly smooth, perforations small, 

 six to eight in number. 



The shell is oval or elliptical, right and left sides equally curved ; 

 depressed, the spire small, lateral, scarcely projecting above the 

 general outline of the shell. The ground-color is whitish-green, 

 mottled and marked all over with triangular or arrow-shaped spots 

 of green or olive. The surface is smooth except for very light 

 growth-striae and narrow impressed spiral lines ; there are a few nar- 

 row raised stria? between the row of holes and the columellar mar- 

 gin. Inside silvery, iridescent. Columellar plate flat, wide above, 

 gradually becoming narrower toward its base. Cavity of spire 

 minute, concealed. Perforations generally 6 or 7, small, their edges 

 not raised. Length 47, width 32, convexity 8 mill. 



Philippines ; Australia. 



H. glabra Chem. Conchyl. Cab. x, p. 311, t. 166, f. 1602, 1603.— 

 Gmelin in Syst. Nat. xiii, p. 3690. — Reeve, Conch. Icon., f. 2, and 

 of authors generally. — H. ziczac Reeve, Conch. Icon., t. 8, f. 24. 



This is one of the smoothest species. Its oval form and the green 

 arrow-shaped blotches of the surface well distinguish it. The H. 

 ziczac of Reeve (pi. 12, fig. 63) is founded on a specimen having 

 slightly more prominent spiral strise. 



H. supertexta Lischke. PI. 6, figs. 28, 29, 30. 



Shell ovate, closely, densely lirate, radiately obsoletely jjlicate, 

 olivaceous or grayish-rufous, variegated with blood red, having 

 streaks of red and green ; lira? nearly equal, crossed by lamella? and 

 very close erect scales, separated by deeply cut grooves. Spire small ; 

 perforations 6-7 open, rounded-ovate ; columellar margin subplane. 



