CHAPTER IX
Dentaliums and Other
Tusk-Shells
Class SCAPHOPODA
Family SIPHONODENTALIIDAE
The tusk-like shell is generally swollen in the middle and is entirely smooth. The foot is worm-like and can be expanded at the end into a round disk. The median tooth of the radula is almost as long as wide.
Genus Cadulus Philippi 1844
Shell small, white, without sculpture and swollen in the middle somewhat like a cucumber. Aperture constricted and very oblique. The genus is divided into four subgenera as follows:
Apex with 2 deep slits Dischides ]t&.vtys i^6-]
Apex with 4 deep slits Polyschides Pilsbry and Sharp 1897
Apex with 2 or 4 shallow slits Platyschides Henderson 1920
Apex without slits:
Obese, convex on both sides Cadulus s. str.
Slender, almost flat on one side Gadila Gray 1847
Subgenus Polyschides Pilsbry and Sharp 1897
Cadulus carolinensis Bush Carolina Cadulus
Figure 69a
North Carolina to Florida and to Texas.
10 mm. in length. Slightly swollen. Apex with 4 shallow slits. In cross-section the shell is roundish. Commonly dredged from 3 to 100 fathoms.
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