GENA. 43 



Specimens of this species before me are deep claret colored, with a 

 few white dots and white flames on the spire ; spiral striae are 

 obsolete except on the base ; the incremental striae are regular, and 

 quite prominent under a lens. The spire is perhaps more elevated 

 than in either G. kevis or G. rosacea and it shows no trace of the keel 

 sketched around at the shoulder in those two species, the outer lip 

 is straight. 



Length 10l», breadth 5 * mill. ; convexity 3 mill. ; aperture, length 

 9, breadth 4f mill. 



G. auricula Lamarck. PI. 2, figs. 21, 22, 23. 



Shell of an elongated, rather narrow Haliotis-shape, smooth, 

 polished, except for growth-lines near the lip ; body-whorl not spirally 

 striate ; color golden, finely reticulated with light golden-brown, and 

 showing several broad and narrow spiral crimson bands. 



The outline is long, with sides more parallel than in G. strigosa ; 

 It further differs from that form and its allies in the polished surface, 

 without spiral striae except on the penultimate and beginning of the 

 last whorl, where fine, scarcely impressed, close spiral lines can be 

 seen under a strong lens ; a few separated impressed striae extend 

 along the columellar margin of the base ; the upper surface has sub- 

 regular radiating stria?. The ground color consists of a fine zigzagged 

 mottling of whitish and light brown, through which the underlying 

 nacre shines with a golden iridescence. There are several narrow 

 spiral lines articulated remotely with white dots ; and on the latter 

 part of the whorl these are replaced by bands or lines of crimson. 

 The aperture is oblong, the posterior angle filled by a pearly callus; 

 outer lip sinuous ; there is a slightly projecting angle where the 

 columella joins the basal lip. 



Length 18, breadth 9 mill ; convexity when lying upon a plane, 

 4? mill.; aperture, length 15|, breadth 71 mill. 



East Indies; Hong Kong. 



Stomatella auricula Lam., An. s. Vert., ed. Desh. ix, p. 17. — Encycl. 

 Meth., t. 450, f. 1. 



I have been unable to see that this species is the same as that 

 identified by Adams with lutea Linn. I have therefore taken the 

 figure in the Encyclopedic Methodique as a type, and have described 

 and figured a shell closely resembling it. As in all Gena the colora- 

 tion will doubtless prove to be variable within wide limits. I have 

 therefore described in detail that of the individual figured. Form 

 and striation are the only reliable characters in this group. The 



