12 STOMATELLA. 



but one ; the pillar less arched, flattened. The axis imperforated. 

 Throat silvery pearly, smooth. ( Gray.) 



Maine's Island, N. Australia. 



S. elegans Gray, in Appendix to Narrative of the Voyage of H. 

 M. S. Fly ii, p. 359, Marine sh., t. 2, f. 1, 1847.— Sowerby in 

 Conch. Icon., f. 27a, b. 



Fig. 10, of pi. 51, is copied from Gray's original figure. Figs. 78, 

 79, pi. 53 are from Sowerby. I have represented on pi. 51, figs. 15, 16, 

 a specimen before me which I believe to be the same species. Com- 

 pared with S. sulcifera it has far more rapidly widening last whorl and 

 wider aperture; the sculpture is much finer. The surface is dull 

 whitish, very irregularly streaked with purplish. The sculpture is 

 scarcely visible (except as fine spiral striae) except under a lens ; then 

 there are seen very numerous unequal or nearly equal spiral threads, 

 slightly crenelated by excessively dense, close incremental elevated 

 striae, which are irregular, somewhat tortuous and elevated in the 

 inter-liral spaces. The spirals are narrower and the striae coarser, 

 more distant, on the upper surface ; at the periphery the spirals are 

 wider, the striae of increment excessively fine and close. The aper- 

 ture is silvery inside, with reflections chiefly of red and blue ; the nacre 

 is almost smooth ; the columella has a new-moon shaped white tract 

 as in S. sulcifera. 



Alt. 16, diam. 25 mill.; aperture, breadth 18, oblique alt. 19 

 mill. ; greater radius 20, lesser 6? mill. 



S. lyrata (A. Ad.) Pilsbry. PI. 2, figs. 3, 4, 5. 



Shell depressed-globose, thin but solid, pinkish, with dots of deep 

 brown or black and white on the spiral riblets. Spire short ; sut- 

 ures deeply impressed ; surface of whorls encircled by narrow spiral 

 lirae, separated by spaces about 1 mill, wide (in a specimen of 15 

 mill, diam.), these interstices closely latticed by oblique raised striae, 

 and bearing on the last part of the whorl from one to three minute 

 spiral interstitial threads. There are about 16 principal threads on 

 the body whorl of the largest specimen before me, but this character 

 is extremely variable. Whorls 3, convex, the last descending. 

 Aperture large, very oblique, rounded-oval, nacreous, iridescent 

 and slightly sulcate within, corresponding to the sculpture of the 

 outside ; columella arcuate, narrow, flattened. 



Alt. 11, diam. 15 mill. ; aperture oblique alt. 11, breadth 10 mill. 



Japan. 



