SMITH : ON THE GENUS VANIKOEO. 109 



9. Vanikoko ktjgata, A. Adams. B.M. 



Vanikoro rugata, A. Adams: Proc. Zool. Soc, 1853, p. 174; Sowerby, 

 Conch. Icon., figs. Sa, h (bad); Thes. Conch., fig. 22; Tiyon, p. 68, 

 fig. 63 (36 on plate by error; copy of Sowerby). 



Hah. — Unknown. Type in B.M. 



Erroneously stated by Sowerby to be a manuscript name. In his 

 figures the spiral lirse are not numerous enough, so that in fig. 83 

 the shell appears to have a distinctly cancellated appearance, which is 

 not really the case. 



10. Vanikoko expansa, Sowerby. B.M. 



Vanikoro expansa, Sowerby: Journ. Malac, vol. viii (1901), p. 102, 

 pi. ix, fig. 3. 



JTab. — N.W. Australia, Holothuria Banks, and Baudin Island, 11-15 

 fathoms (J. J. Walker). Type in B.M. 



Judging by a specimen in Mr. Melvill's collection labelled "Australia, 

 Cox Collection," the shell described by Sowerby is merely the young 

 of a species which attains a diameter of 14 mm. It has the remark- 

 ably strong cancellation of the spire as described and figured by 

 Sowerby, but this, almost suddenly, alters upon the body- whorl into 

 spiral delicate threads, at first crossed by fine oblique plicae, which 

 are somewhat nodulous upon the threads. These plicae gradually 

 die out, so that the last half of the whorl is merely finely spirally 

 sculptured and crossed by fine oblique growth-striae. Another 

 specimen also in Mr. Melvill's collection, " ex Lombe Taylor Coll.," 

 has a similarly sculptured spire, but the threads on the body-whorl 

 are coarser. The umbilicus in this shell is wider than that of the 

 other. 



11. Vanikoeo distans (Eecluz). B.M. 



Narica distans, Recluz : Proc. Zool. Soc, 1843, p. 140 ; Rev. Zool., 

 1844, p. 7 ; Mag. de Zool., 1845, p. 45, pi. cxxix, fig. 1. 



Fafiikoro distatis, Sowerby : Conch. Icon., figs. \3a, b ; Thes. Conch., 

 p. 169, fig. 14; Tryon, p. 70, fig. 93 (copy of Conch. Icon.), 

 fig. 135. 



Hab. — Bohol, Philippines. Type in B.M. 



The remote oblique costae, with the fine transverse striae, are the 

 distinguishing features of this species. 



12. Vanikoro scalakina, Gould. 



Vanikoro scalaritia, Gould: Proc. Bost. Soc. Nat. Hist., 1859, vol. vii, 

 p. 44; Otia, p. 110. 



JTab.— Loo Choo (Gld.). 



Known only by the description. A small species, 10 mm. in length, 

 widely umbilicated, with remote elevated imbricating lirae, decussated 

 with revolving threads. 



VOL. VIII. — JUNE, 1908. 9 



