7fi CON US. 



streaked with chestnut, the coloring usually interrupted by the 

 revolving sculpture so as form revolving series of spots. 



Length, 1-25-1/75 inches. 



Mazatlan, West Coast of Mexico. 



Very probably C. scalaris, Val. (PL 27, fig. 10), is an overgrown 

 specimen of this species, with the spire gradate, and abnormally 

 produced. 



C. UNDATUS, Kiener. PL 24, figs. 99, 100, 1, 2. 



Shell strongly spirally striate ; yellowish brown, marbled with 

 chestnut, which is interrupted by the revolving sculpture so as 

 to form many short, close lines of color. Length, 35 mill. 



Fiji Islands (Sowb.), China. 



C. subaequalis, Sowb. (fig. 100), a young shell, C. Sowerbyi, 

 Reeve (fig. 1), and C. cingulatus, Reeve, not Lamarck (fig. 2), 

 are synonyms. 



C. CINGULATUS, Lam. PL 24, figs. 3, 4. 



Shell with nearly direct sides, body-whorl sulcate below ; 3'eJ- 

 lowish, striped longitudinally with chestnut, with close series of 

 revolving chestnut spots. Length, 1/85 inches. 



Philippines. 



Very closely allied to C. undo.tus, Kr., and possibly a variety 

 of that species ; both of them are too closely related to C. arcu- 

 atus, Brod. and Sowb. C. Sinensis, Sowb. (fig. 4), is a synonym. 



C. ACUTANGULUS, Hwass. PL 24, fig. 5. 



Shell with concavely elevated spire, carinate and usualty 

 minutely tuberculate at the sutures ; body-whorl encircled by 

 punctate grooves; white, clouded with light chestnut, with usually 

 an ill-defined central white band. Length, '5-1 inch. 



Philippines. 



Is very probably the young of C. cancellatus, Lam. The West 

 Indian species usually known to American collectors under this 

 name, I refer to C. verrucosus, Hwass. 



C. COMMODUS, A. Ad. 



Shell elongately turbinated, narrow, smooth, base obliquely 

 sulcate ; white, under a fulvous epidermis ; spire elevated, con 



