16 CONUS. 
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. (P1. 27, fig. 10), isan overgrown 
specimen of this species, with the spire gradate, and abnormally 
produced. 
C. unpatTus, Kiener. PI. 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. subeequalis, Sowb. (fig. 100), a young shell, C. Sowerbyt, 
Reeve (fig. 1), and C. cingulatus, Reeve, not Lamarck (fig. 2), 
are Synonyms. 
C. cinauLatus, Lam. PI. 24, figs. 3, 4. 
Shell with nearly direct sides, body-whorl sulcate below; yel- 
lowish, striped longitudinally with chestnut, with close series of 
revolving chestnut spots. Length, 1°85 inches. 
Philippines. 
Very closely allied to C. undatus, 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. PI. 24, fig. 5. 
Shell with concavely elevated spire, carinate and usually 
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. commopus, A. Ad. 
Shell elongately turbinated, narrow, smooth, base obliquely 
suleate; white, under a fulvous epidermis; spire elevated, con 
