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.). If. Grayana BoWEEBY, 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 stride 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. 



Ph ilippin es ; A ustralia. 



H. <7/amCHEM. 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 stride. 



H. SUPERTEXTA Lischke. PL 6, figs. 28, 29, 30. 



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

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

 streaks of red and green ; lirse nearly equal, crossed by lamellse and 

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

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



