60 SCALAKIA. 



S. RUBROLTNEATA, Sowb. PI. 12, figS. 82, 83. 



Narrowly umbilicated, thin, yellowish white, two-banded with 

 light chestnut, the upper band narrower and fainter, sometimes 

 obsolete ; whorls 5, well rounded, with rather numerous, thin, 

 erect lamellae. Length, 15-20 mill. Australia, Philippines. 



S. DUBTA, Sowb. PI. 12, figs. 67, 68. 



Moderately umbilicated, white ; whorls 9, well rounded, con- 

 tiguous, with numerous thin, thread-like, low lamellae and 

 scarcely perceptible spiral striae. Length, 1-5 inches. 



Port Essington, Australia. 



The original description was from a young specimen; the 

 adult was described by Gray, three years subsequently, under 

 the name of S. striata (fig. 68). 



S. UNDULATISSIMA, Sowb. PL 12, fig. 70. 



Perforate, thin, white, very minutely spirally striated, with 

 close fine undulated lamellae, a little aculeate at the top of the 

 whorls ; whorls 9, well rounded, slightly shouldered at the 

 suture. Length, 1 inch. Habitat unknown. 



S. IRREGULARIS, Sowb. PL 12, fig. 71. 



Umbilicated, white, thin, with very thin, numerous irregular 

 varices, a little aculeated above; whorls 6, well rounded, con- 

 tiguous. Length, 22 mill. Philippines. 



Yery closely allied to S. dubia ; the figure, however, represents 

 closer, coarser lamellae than in that species. 



S. SIMILTS, Sowb. PL 12, fig. 72. 



Narrowly umbilicated, thin, white, very minutely spirally 

 striated ; whorls 6, contiguous, lamellae close and thin. 



Length, 18 mill. Philippines. 



. SMITHII, Tryon. PL 12, fig. 73. 



Fulvous grayish, very finely spirally striated; whorls 8, 

 rounded, the last, somewhat inflated, with close, thin lamellae. 



Length, 14 mill. 



Whydah, W. Africa. 



This species was described as S. miranda, E. A. Smith, and 

 the name is changed on account of the previously published 

 Crosseia miranda^ A. Ad. 



