82 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
anteriorly; posterior angle acute; outer lip thin; inner lip short, moderately 
stout, curved, reflected over, and appressed to the base, except at the ex¬ 
treme tip, where it is free; parietal wall covered with a thick callus. 
Length, 7; diameter, 1.8 mm. (Bartsch.) 
Type in United States National Museum, No. 251395. Type locality, 
United States Bureau of Fisheries Steamer “Albatross” Station 2902, in 53 
fathoms, off Santa Rosa Island, California. 
Range. Santa Rosa Island to San Diego, California. 
Strombiformis californicus Bartsch, 1917 
Plate 48, fig. 5 
Proceedings of the United States National Museum, 53:340; PI. 45, fig. 5. 
Shell narrowly subulate, polished. Early whorls yellowish-white, suc¬ 
ceeding ones light brown, marked with a dark chestnut-brown band at the 
periphery. A second one of equal strength and size is a little anterior to 
the middle between the summit and the periphery; lip edged with dark 
brown. Early whorls rounded, separated by impressed sutures, the suc¬ 
ceeding turns flattened with scarcely defined suture, marked by exceedingly 
fine lines of growth and slightly retractive, irregularly disposed, pale 
brown, varicial streaks. Periphery of the last whorl well-rounded. Base 
produced, well-rounded. Aperture elongate, oval; posterior angle acute, 
slightly effuse anteriorly; outer lip thin, inner lip long, curved, revolute 
appressed to the base, excepting at the very tip, where it is free; parietal 
wall covered with a moderately thick callus. Length, 11.5; diameter, 
2.1 mm. (Bartsch.) 
Type in United States National Museum, No. 249619. Type locality, 
San Diego Bay, California. 
Range. Catalina Island to San Diego, California. 
Strombiformis alaskensis Bartsch, 1917 
Plate 48, fig. 1 
Proceedings of the United States National Museum, 53:339; PI. 45, fig. 1. 
Shell small, straight, yellowish-white, marked by exceedingly fine lines 
of growth only. Whorls rather high, almost flattened, appressed at the 
summit, separated by a scarcely impressed suture. Periphery of the last 
whorl well-rounded, base moderately long, moderately rounded. Aperture 
oval; posterior angle acute; outer lip decidedly protracted between the 
posterior angle and the base; inner lip moderately stout, curved, reflected 
over and appressed to the base; parietal wall glazed with a moderately 
thick callus. Length, 4.2; diameter, 1.4 mm. (Bartsch.) 
[ 380 ] 
