STOMATELLA. 11 



concentrically striate. Smaller than S. papyracea, more solid, and 

 more sharply sculptured. 



Swan River (Mus. Cuming). 



S. baconi A. Ad., P. Z. S. 1853, p. 73 ; in Sowb., Thes. Conch, ii, 

 p. 838, t. 174, f. 25, 26.— Sowerby in Conch. Icon., f. 16. 



This seems to me a variety of the papyracea. The whorls are 

 clouded with rufous, and the lirse are minutely articulated. The 

 sculpture, especially the longitudinal striae, are decidedly stronger 

 and sharper than in S. papyracea. 



S. sulcifera Lamarck. PI. 52, fig. 59. 



Shell orbicular, rather thin, the spire short, conoidal, grayish or 

 pinkish, with narrow reddish-brown irregular longitudinal stripes, 

 often broken into dots on the spirals. Sculpture of narrow spiral 

 riblets with interstitial smaller threads, the interstices finely latticed 

 by raised close longitudinal stria?. Whorls about 4, the last 1? very 

 rapidly widening, descending anteriorly. Aperture large, oblique, 

 oval, lightly sulcate within and brilliantly iridescent, with red, sky- 

 blue and green reflections, neither predominating. Columella 

 arcuate, thin, with a new-moon shaped flat white or slightly irides- 

 cent tract bounding it. 



Alt. 19, diam. 22 mill. ; aperture, breadth 15?, oblique alt. 19 

 mill. ; greater radius 17, lesser 6. 



Philippines. 



S. sulcifera Lam., An. s. Vert., p. 210. — Delessert, Pec. de Coq., 

 t. 33, f. 3.— Adams, in P. Z. S. 1850, p. 30; in Thes. Conch, ii, p. 

 833, t. 174, f. 3. — Sowerby in Conch. Icon., f. 11. 



This is a less globose shell than S. papyracea or baconi, with more 

 oblique aperture and rougher sculpture. From most species having 

 alternately larger and smaller spirals and latticed sculpture it is 

 separated by the more globose body-whorl and the greater difference 

 between the longer and shorter radii, the ratio being about 3 to 1, 

 more or less. 



S. elegans Gray. PI. 51, figs. 15, 16, 10 ; pi. 53, figs. 78, 79. 



Shell oblong, rather depressed, white, black-spotted, showing the 

 pearl through the semitransparent outer coat, closely and regularly 

 spirally striated and concentrically wrinkled. Spire small, conical ; 

 whorls rounded, convex ; the last very rapidly enlarging. Mouth 

 oblong, spread out twice as wide as the diameter of the last whorl 



