Distribution: Florida, Texas; Brazil; Bermuda. Size: 39 to 51 mm
Description: Color dull whitish to light brown with dark brown markings; shape ovate with raised spire; sculpture of strong, spirally arranged, nodulose ridges found at shoulder and midregion of whorls with many spiral lines found between the nodulose ridges; axial sculpture of irregular growth lines; aperture subovate; outer lip thick and crenulate; inner lip with smooth parietal shield with an anal ridge at the upper margin opposite the small anal canal.
Habitat: Hard substrates; usually rocks or jetties exposed to the ocean at depths from 0 to 4 m (13 ft)
Remarks: Resembles S. canaliculata but is smaller, knobs more nodulose, outer apertural lip does not flare, and siphonal canal straighter. See Clench (1947); Rehder (1981).