SO AL ART A. 57 



S. TENUILIRATA, Sowb. PI. 11, fig. 51. 



Perforate, purple brown between the varices ; whorls 6> 

 rounded, rapidly increasing, with deep suture, lamellae very 



close, unequal, thin, rounded, reflected. Length, 12 mill. 



Japan. 



S. LAXATA, Sowb. PL 11, fig. 52. 



Narrowly umbilicated, thin, smooth, white ; whorls 6, much 

 disunited, with numerous, thin, scarcely regular lamellae. 



Length, 20 mill. 



Ins. Luzon, Philippines. 



S. HYALINA, Sowb. PL 11, figs. 53, 54. 



Widely umbilicated, solute, smooth, thin, pellucid, white; 

 whorls 6, with distant, crenulated varices. Length, 18 mill. 



Ins. Luzon, Philippines ; Singapore. 



S. SOLTJTA, Dunker. PL 11, fig. 55. 



Umbilicated, white ; whorls 5, well rounded, disunited, with 

 about ten crenulated white lamellae, usually four-lobed in the 

 last whorl. Length, 5 mill. 



St. Thomas, West Indies. 



S. SEMIDISJUNCTA, Jeffreys. PL 11, fig. 56. 



Subim perforate, corkscrew-shaped, white ; whorls 7-8, flat- 

 shouldered, with close-set, flexuous, sharp lamellae, the inter- 

 stices very finely spirally striated. Length, 12 5 mill. 



Azores, 2199 fms. 

 S. VERMETIFORMIS, Watson. PL 18, fig. 74. 



Solute, thin, white; whorls 6, rounded, with numerous low, 

 fine, sinuous lamellae, and fine spiral lines. Length, 6 mill. 



Off Pernambuco (350 fms.). 



S. PRINCIPALTS, Pallas. PL 12, fig. 58. 



Narrowly umbilicated, thick, white, irregularly spirally stri- 

 ated ; whorls 8-10, well rounded, scarcely in contact, with rather 

 numerous, low lamellae. Length, 1*75 inches. 



Tortola, W. Indies. 

 S. COSTULATA, Kiener. PL 12, fig. 59. 



Narrower, with more numerous, lower lamellae than the prece- 

 ding species, but possibly only a variety. Length, 34 mill. 



W. Columbia (Cuming). 



