LEPTOTHYRA. 249 



L. cuNNiNGHAMi E. A. Smith, ]881. PI. 57, figs. 0(1, 57. 



Shell small, subglobose, perforate in the young state, when adult 

 imperforate, of a rose-madder color ; whorls 42 , the apical one whit- 

 ish, the rest convex, and finely spirally striated, also marked with 

 faint oblique lines of growth ; suture rather deep; last whorl ob- 

 li(piely descending near the lip, somewhat flattened beneath near 

 the center ; aperture obliquely subcircular, iridescent Avithin ; colu- 

 mella pearly, spread over the umbilicus ; labrum with a narrow 

 pinkish margin within. Alt. 42 , diam. 5 mill. (Smith.) 



Port Rosario and Portland Bay, Patagonia. 



Operculum as usual in the genus. 



L. SANGuiNEA Linn., 1758. PI. 49, figs. 48, 49 ; pi. 64, figs. 60, 61. 



Shell small, very solid, orbicular, depressed, with conic spire; 

 whorls 42-5, convex, strongl}^ spirally lirate, the linie smooth, about 

 twelve in number on body-whorl, three on penultimate whorl, not j)er- 

 ceptibly crenulated by the very subtle incremental stride ; above the 

 lirse are coarse, smooth, and generally irregularly spaced, interstices 

 smooth, as wide or wider than the ribs; below more finely lirate ; last 

 whorl well rounded, deflected anteriorly ; aperture somewhat con- 

 tracted, oblique, pearly white within, peristome rather thick, its ends 

 not converging, columella short, slightly arcuate, thick and heavy, 

 terminating below in an obtuse tubercle, base of aperture some- 

 times bearing an inconspicuous dentiform callus at margin ; color 

 deep crimson. Alt. 6, diam. 7 mill. 



Mediterranean and Adriatic Seas. 



The species has also been dredged ofl" the Atlantic Coast of France. 



Operculum (pi. 60, figs. 54, 55) inside slightly convex, light yel- 

 low, with about ten very slowly and regularly increasing whorls, 

 the last third of the outermost considerably widened ; outside 

 calcareous, white, flat, concave in the central area and coarsely ru- 

 gose, outer margins with a slightly elevated very finely radiately 

 wrinkled concentric rib, which is slightly more elevated near its ter- 

 mination. 



The synonyms are T. purpureus Risso, T. coccineus Miihlf, and 

 T. helUa-i Payr. 



The diflerential characters of L. earpenteri, L. sanguinea and L. 

 sangarensis are pointed out under the descriptions of the first and last 

 species. There is not the slightest occasion for any longer confound- 

 ing these three unfortunate species. The occurence of the real Z/. 

 sanguinea Linn, in Japanese waters still requires confirmation. 



