168 LEUCOTINA. 



The rather solid shell is encircled by regular ribs flat above and 

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

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



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



Shell pyramidally turbinated, transversely prominently ridged 

 and grooved throughout ; white ; spire sharply acuminated ; col- 

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



Hong Kong, China. 



Parthenia lyrata Cpr. MS. in Mus. Cuming. — Tornatella lyrata 

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



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

 being finely linearly grooved, is closely strongly grooved and ridged 

 (RveX 



L. SULCATA A. Adams. 



Shell white, solid, ovate-conic, unibilicated. Whorls 3i, a little 

 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.). 



Leucotina sulcata Ad., Ann. Mag. N. H.(3),viii, p. 241, Sept., 1861. 



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

 however, it diff^ers 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. PI. 49, fig. 7. 



Shell white, thin, oblong-oval ; whorls 3j, a little convex, trans- 

 versely sulcate, the interstices punctate. Aperture oblong, subpro- 

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

 outer lip acute, simple. (Ad.). 



\^ 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, Conch. 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 Al, a 

 little convex, transversely lirate, the interstices very delicately long- 



