CLASS GASTROPODA 
81 
Haliella lomana Dali, 1908 
Plate 43, fig. 1 
Proceedings of the United States National Museum, 34:253; 53:337; PL 44, fig. 1. 
Shell slender, acute, flat-sided or nearly so; chalky white, with an ex¬ 
tremely thin, yellowish, external coating; nucleus eroded; subsequent 
whorls very slightly convex, with an obscure peripheral angle on the last 
whorl, upon which the suture of the advancing whorl is closely appressed; 
surface smooth and polished except for very obscure and minute spiral 
lines only visible in good light with a lens; base convexly rounded, im¬ 
perforate ; aperture ovate-quadrate, the outer lip simple, thin, gently arcu¬ 
ate; the body bare, the pillar almost straight, twisted and with a very 
obscure prominence like an obsolete plait; an examination of the interior of 
the upper whorls, however, shows no plication; anterior of the aperture 
gently rounded; there are no indications of varices or resting stages on the 
spire. Height of shell, 20.0; of last whorl, 10.0; of aperture, 6.5; max. 
diam., 7.0 mm. (Dali.) 
Type in United States National Museum, No. 110652. Type locality, 
United States Bureau of Fisheries, Station 4354, sixteen miles off Point 
Loma, San Diego, California. 
Range. Known only from type locality. 
Genus STROMBIFORMIS Da Costa, 1778 
Very attenuated, slender Melanellids, with very narrow elongated aper¬ 
ture, having the inner lip appressed to the attenuated basal portion of the 
preceding whorls; marked with one or more spiral color bands. (Bartsch.) 
Type. Strombiformis glaber Da Costa. 
Distribution. West Indies, west coast of North America, Florida. 
Fossil: Pliocene. 
Strombiformis almo Bartsch, 1917 
Proceedings of the United States National Museum, 53:342; PL 46, fig. 5. 
Shell broadly elongate-conic, polished, bluish-white, excepting a broad 
band of light chestnut-brown, which encircles the turns covering a little 
more than half the spaces between the periphery and the summit and ex¬ 
tending for an equal distance over the base. Early whorls rounded, sep¬ 
arated by a well-impressed suture, the succeeding turns moderately 
rounded, with very poorly impressed suture, marked by faint lines of 
growth and an occasional almost vertical line, which is not accompanied 
by any brown marking. Periphery of the last whorl well-rounded. 
Base produced, well-rounded. Aperture broadly ovate, somewhat patulose 
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