HALIOTIS. 1 09 



ones are placed ; oblique waves (similar to those of H. iris and 

 australis) cut these, so that it appears somewhat granbse. The 

 space below the row of perforations also has longitudinal lines, and 

 besides these a broad but shallow channel, such as occurs in so many 

 species. The perforations are circular, their diameters about half 

 the width of the interspaces. Five of them are open. The nacre 

 is whitish. Length 2?f; width 181, alt. 9 lines. 



Australia f 



H. gibba PHIL. Abbild. u. Beschreib. ii, Haliotis, t. 4, f. 2a, b 

 (Feb. 1846); not of Reeve and others. 



The above paragraph is a translation of Philippics description, 

 and the figures are drawn from his. No one has identified this 

 form since its original publication, so far as I know. It is separated 

 from H. virginea Chem. (subvirginea Weinkauff, gibba Eeeve) by 

 its greater convexity, greater width,* fewer, more separated, round 

 perforations, and the less numerous spiral riblets. 



H. CRISPATA Gould. PL 16, figs. 87, 88. 



Shell small, very thin and delicate, of an elongated oval, and more 

 than usually convex form, the surface marked with fine, regular, 

 equal, revolving threads, and with very delicate, branching, oblique, 

 zigzag ripples, which are almost equally conspicuous in the interior. 

 The spire is prominent, of a little less than three whorls, the apex 

 nearly on the median line. The perforations are small, rounded, 

 slightly tubular, numerous and crowded, six or seven of them open ; 

 and external to the series is a deep canal. The color is bright 

 brick-red or red-lead color, having between the canal and the mar- 

 gin a few narrow and distant yellowish-white stripes. The interior 

 is brilliant, silvery, and somewhat iridescent. (Gould.) 



Length an inch and three-eighths ; breadth seven-eighths of an 

 inch. 



Australia f 



H. crispata OLD. Proc. Bost. Soc. N. H. ii, p. 251, Dec., 1847; 

 U. S. Expl. Exped. Shells, p. 208, f. 248, 248a. 



About the size and form of H. stomaticejormis Rve., but distin- 

 guished from all others by its crowded angular ripples, arranged 

 somewhat like the colors on H. ziczac. No shell approached it in 

 this respect except the very young of H. Australis. ( Old.) 



