Plate 18k
Southern third of California to Mexico.
3⁄4 to 1 inch in length, heavy; dark grayish to gray-green; characterized by a golden-yellow stain within the deep, round, narrow umbilicus, by the sky-blue band around the umbilicus, and by the 4 or 5 strong, smoothish, spiral cords on the periphery and the base. Top of whorls with weak, crude, slanting, axial wrinkles. A moderately common, littoral, rock-loving species.
Plate 18h
Monterey, California, to Acapulco, Mexico.
3⁄4 inch in length, heavy; whorls and spire convex. Umbilicus very deep, round and fairly narrow. Whorls with numerous, beaded, spiral cords. Outer lip sharp, but thickened and pearly within. Lower part of lip with about 8 small nodules opposite the spiral threads which run back into the aperture. Color rusty-brown with black flecks. Compare with aureotincta whose umbilical area is stained with greenish blue and golden-yellow. A moderately common littoral, rock-dweller.
Subgenus Chlorosroma Swainson 1840
Plate 3f
Catalina Island to the Gulf of California.
11⁄2 inches in length, slightly wider; 6 to 7 whorls, spire flat-sided; base slightly concave. With numerous slanting, small, axial cords. The crenulated periphery slightly overhangs the suture of the whorls below. Base with strong, arched lamellae. Color dark purplish gray. Umbilical region stained with bright golden-yellow. A rather rare and choice collector’s item secured by diving. It has also been washed ashore on Catalina Island.
Subgenus Promartynia Dall 1909
Plate 18y
Alaska to Santa Barbara, California.
1 to 11⁄2 inches in length, slightly wider. Resembles brunnea, but has a deep, round umbilicus and a thin, rather sharp columella. It is also very similar to montereyi, but its whorls are more rounded and its umbilicus is more smoothly rounded and without the white color and faint spiral ridges found in montereyi. This species is doubtfully placed here and perhaps
