168 LEUCOTINA. 



The rather solid shell is encircled by regular ribs flat above an<l 

 obsoletely striated, on the last whorl 22-26 in number. The inte 

 vening sulci are seen under a lens to be striated and cancellated. 



L. LYRATA (Cpr.) Reeve. PL 18, figs. 70, 71. 



Shell pyramidally turbinated, transversely prominently ridgeJ 

 and grooved throughout ; white ; spire sharply acuminated ; coB 

 umella but little plaited; aperture small. (Rve.). 



Hong Kong, Chinm 



Parthenia lyrata CPR. MS. in Mus. Cuming. Tornatella lyram 

 REEVE, Conch. Icon, xv, pi. 4, f. 21, 1865. 



Closely resembling L. modesta in form, but the surface instead of 

 being finely linearly grooved, is closely strongly grooved and ridgel 

 (Jf&e.). 



L. SULCATA A. Adams. 



Shell white, solid, ovate-conic, umbilicated. Whorls 3, a littll 

 flattened, transversely deeply sulcate, the sulci obsoletely punctate. 

 Aperture oblong ; inner lip a little straightened, furnished with a 

 vanishing fold. (Ad.). 



Corea Strait, 46 fms. (Ad J 



Leucotina sulcata AD., Ann. Mag. N. H.(3),viii, p. 241, Sept., 186LJ 



L. niphonensis A. Ad. is the nearest to this species, from which,, 

 however, it differs in being more conoidal, shorter and broader ; the 

 transverse obscurely punctate grooves, moreover, are very deep, and 

 the umbilicus is conspicuous and open. (Ad.). 



L. NIPHONENSIS A. Adams. PL 49, fig. 7. 



Shell white, thin, oblong-oval ; whorls 82, a little convex, tra 

 versely sulcate, the interstices punctate. Aperture oblong, subp: 

 duced in front; inner lip with an oblique fold, scarcely conspicuous 

 outer lip acute, simple. (Ad.). 



16 miles from Mino-Sima, off Niphon ; Strait oj Corea, 63 fms 

 (Ad.). 



Leucotina niphonensis AD., Ann. Mag. Nat. Hist. (3), v, p. 407 

 Tornatella niphonensis REEVE, Couch. Icon, xv, pi. 4, f. 16. 



This species is the type of Adams' genus Leucotina. 

 L. EXARATA A. Adams. 



Shell ovate-conic, white, umbilicated, rather solid ; whorls 

 little convex, transversely lirate, the interstices very delicately long 



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