monograph seems \<> 1"- in most instances a bad copy and translation of that of Reeve, has 

 overlooked that mistake. 



10. Sm/a 'a n. sp. PI. XV, fig. 2. 



Stat. '.( S., 1 18 15'.2E. I M. Fine grey mud. 2 Spec. 



Shell subperforate, pyramidal, thin, whitish; nucleus wanting, remaining whorls 8, very 

 convex, obtusely angular at the shoulder, slightly disunited, nearly smooth, but with a few 

 te spiral striae and fine growth-striae; the whorls are crossed by thin, slightly reflected 

 in number on the last whorl; these ribs are spinous at the shoulder, their margin is 

 serrulate serrulations may be natural or caused by friction) they are practically equal, 



none of them being varix-like; base of shell regularly rounded. Aperture circular, right margin 

 thin (young? it> columellar margin broadly reflected over the perforation and (pjite covering, 

 but probably not closing it. 



Alt. 14 1 /.-. bit. 5 Mill.; aperture of a specimen long 9'/-, Mill., 2 1 /., Mill. 



This species resembles in shape the preceding one, but it is quite different by its nearly 

 smooth interstices of the ribs, which are themselves more simple, being undulate in S. fragilissima. 



11. Scala Clathrus) Melvilli n. sp. PI. X1Y, fig. 9. 



Stat. 114. Kwandang-bay-entrance. 75 M. Hard sand, very line. 1 Spec. 



Shell pyramidal. imperforate, very thin, transparent, white. Whorls 9, of which 3 smooth 

 nuclear ones. Postnuclear whorls very convex, slightly shouldered, with a very deep suture ; 

 upper and basal part of each whorl smooth, median part with 3 thin spiral ribs in the inter- 

 stices of the radiating ribs, which are thin, lamellose, flexuous, with an auricle at the suture 

 and another at the shoulder, moreover an undulation at the peripheral part, and a second one 

 near the base of each whorl; in the upper whorls the ribs are more simple. Aperture circular, 

 with a broadly expanded margin, formed by the last rib, of which there are 15 on the last 

 whorl; columellar margin narrowly reflected, accompanied at the place of the umbilicus by a 

 lamellose rim. 



Alt. 5' . lat. y ; apert, i 1 /, .Mill. in diameter. 



This species resembles .S". malcolmensis Melvill (Memoirs and Proc. Manch. Lit. and Phil. 

 Soc. Vol. 42, 1S9S, p. 20, PI. 7, lig. 21. but the ribs of the new species are much more elaborate, 

 being flexuous. 



12. Scala f Opa/ia j lamellosa Lamarck. 



LAMARCK. An. s. veil. Ed. II. Vol. XIX. p. 73. 



KlENER. ( oq. Viv. Vol. IX. Scalaria, p. 10. PI. 3, fig. -. 

 TRYON. Man. <.f Conch. Vol. IX, p. 74. PI. 15. fig. 83, 84, jj. 



Stat. ii'». West "f Kwandang-bay-entrance. 72 M. Fine sand with mud. 1 Spec. 



[52. Wunoh-bay, X. \Y. coast "f Waigeu-island. $2 M. Lithothamnion-bottom. 1 Spec. 



the name perplexa Pse. would bc the most fitting one lor this shell, as really 



1 1 



