Page:American Seashells (1954).djvu/315

Rh Former distinct varices present every % of a whorl. Sculpture very finely cancellate and beaded. Nucleus brown, smooth and bulbous. Shell ash-gray with occasional orange-brown smudges. Uncommonly dredged on rocky bottom just ofi'shore. Colubraria test ace a Morch from Tortugas and the West Indies is % to 1% inches in length, fatter, with numerous, small beads and with wider varices. C. sivifti Tryon (subgenus Monostiohnn Dall), also from the West Indies, is % inch long, without former varices, axially ribbed and heavily maculated with brown. Both are uncommon. Genus Pisania Bivona-Bernardi 1832 Fisania pusio Linne Miniature Triton Trumpet Plate 13-0 Southeast Florida and the West Indies. I to 1% inches in length, sturdy, smooth, and usually with a glossy finish. The outer lip is weakly toothed within, and the upper parietal wall has a small, white, swollen tooth near the top of the aperture. Color variable, but usually purplish brown with narrow spiral bands of irregular dark and light spots commonly chevron-shaped. Moderately common below low- water line in the region of coral reefs. Genus Cantharus Roding 1798 Subgenus Pollia Sowerby 1834 Cantharus tmctits Conrad Tinted Cantharus Plate 25y North Carolina to both sides of Florida and the West Indies. % to I /4 inches in length, heavy, spire evenly conic; aperture with a small canal at the top. Axial ribs low and weak. Spiral cords numerous and weak, forming weak beads as they cross the ribs. Inside of outer lip with small teeth which are strongest near the top. Color of shell variegated with yellow-brown, blue-gray and milky-white. Fairly common in shallow water. The young are easily confused with Thais. See remarks under T. rustica, p. 214. Cantharus auritula Link Gaudy Cantharus Southeast Florida and the West Indies. Similar to C. tinctus, but broader, with shouldered whorls, with about 9 stronger axial ribs per whorl and with about 10 sharp spiral threads on