192 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Odostomia edmondi E. Jordan, 1920 
Proceedings of the United States National Museum, 58:3; PL 1, fig. 2. 
Shell small, fairly solid, conic; surface more or less eroded, the sculp¬ 
ture if present, no longer in evidence; nuclear whorls prominent, hardly 
immersed; post-nuclear whorls nearly but not quite flat; sutures not very 
prominent, hardly channeled; base moderately long, evenly rounded; um¬ 
bilicus very minute, closed; aperture egg-shaped; peristome almost com¬ 
plete ; columella and inner lip with considerable callus and one oblique 
plait. Color gray. Length, 3.1; diameter, 1.8 mm. (E. Jordan.) 
Type in United States National Museum, No. 334787. Type locality, 
Trinidad, California. 
Range. Known only from type locality. 
Odostomia esilda Dali and Bartsch, 1909 
Bulletin 68, United States National Museum, 196; PL 22, fig. 1. 
Shell elongate-ovate, light yellow. Nuclear whorls decollated. Post- 
nuclear whorls inflated, slightly rounded in the middle, more so toward the 
suture, and the appressed summit. Periphery and base of the last whorl 
well-rounded, the latter narrowly umbilicated. Entire surface of spire 
and base marked by vertical lines of growth and numerous very fine, 
closely spaced, spiral lirations. Aperture large, oval, slightly effuse an¬ 
teriorly ; posterior angle obtuse; outer lip thin; columella slender, strongly 
reflected, almost closing the umbilicus; provided with a strong, deep-seated 
fold at its insertion. Length, 5.5 ; diameter, 2 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 206909. Type locality, 
United States Bureau of Fisheries Station 2936, in 359 fathoms, off San 
Diego, California. 
Range. Known only from type locality. 
Odostomia franciscana Bartsch, 1917 
Proceedings of the United States National Museum, 52:665; PL 45, fig. 7. 
Shell thin, broadly elongate-conic, yellowish-white. Nuclear whorls 
small, deeply embedded in the first of the succeeding turns, above which 
the tilted edge of the last volution only projects. Post-nuclear whorls 
inflated, well-rounded, feebly shouldered at the summit, marked by almost 
vertical, very feeble, incremental lines and exceedingly fine, closely spaced, 
spiral striations. Suture moderately constricted. Periphery of the last 
whorl very feebly angulated. Base short, inflated, well-rounded, with a 
very narrow umbilical chink. Aperture large; posterior angle acute; outer 
lip thin; inner lip strongly curved, somewhat reflected and provided with 
[ 490 ] 
