18 STOMATELLA. 



This is a species of great delicacy and beauty, most nearly allied 

 to S. haliotidea of Sowerby, but with the umbilical region surrounded 

 by a smooth white space and with the columellar margin reflexed 

 and producing the appearance of an umbilicus. (Ad.) 



Habitat unknown. 



S. selecta AD., P. Z. S. 1854, p. 133. Sows, in Conch. Icon., f. 

 29. 

 S. FULGURANS A. Adams. PI. 52, fig. 42. 



Shell depressed, thin, with small, erect, acute spire ; light fawn- 

 colored or grayish, with close narrow oblique stripes of reddish, as 

 wide as their intervals ; surface lusterless, sculptured with very 

 close, fine spiral striae, scarcely visible except under a lens ; there 

 are also a few (3 or 4) slightly elevated carinse on the upper surface. 

 These are scarcely noticeable. There are minute, close stride of 

 growth, more prominent on the spire. The base is much smoother. 

 Spire acute, apical whorl rounded projecting, brown. Whorls 5, the 

 last very large, scarcely descending anteriorly. Aperture quite 

 oblique, slightly sulcate within, the layer of nacre very thin ; col- 

 umella a trifle expanded at the axis over a minute umbilical chink, 

 bounded by a crescent-shaped white tract. 



Alt. 9, diam. 14 mill. ; aperture, breadth 9, oblique alt. 8! mill. ; 

 breadth of columellar white crescent 21 mill. 



Philippines. 



S.fulgurans AD., P. S. Z. 1850, p. 32 ; Thes. Conch, ii, p. 837, t. 

 174, f. 12. SOWERBY in Conch. Icon., f. 1. 



Very similar in contour to S. mariei, but differing in color and 

 sculpture. 



S. SANGUINEA A. Adams. PL 53, figs. 85, 86. 



Shell depressed, thin, deep crimson colored, with a crescent of 

 white bordering the columella. The sculpture consists of rather 

 narrow, spaced, acute spiral cords, of which there are two larger ones 

 on the upper surface (one at the shoulder), the spaces between 

 occupied by intervening smaller spirals and very close, fine, micro- 

 scopic spiral stride, decussated by finer radiating striae of increment ; 

 the upper whorls with low, radiating, scarcely visible folds. The 

 base is nearly smooth, having only fine separated spiral threads with 

 flat inter-spaces, all sculpture becoming obsolete in the white cres- 

 cent except the fine, very oblique growth-lines. The principal 

 spirals of the upper surface are more or less distinctly beaded ; the 





