CLASS GASTROPODA 
277 
Distribution. West Indies, Philippines, Hawaiian Islands, South 
Africa, Gulf of California, Central America, China, Japan, Australia. 
Fossil: Tertiary. 
Nitidella gouldi Carpenter, 1856 
Proceedings, Zoological Society of London, 208, 1856. 
N. t. parva, elongata, conica, laevi, circa basin spiraliter, striata; anfr. 
vii. subplanatis, suturis distinctis; albida, aurantio varie picta; apertura; 
subquadrata, labro sinuato, subacuto, intus conspicue dentato; labio parvo, 
vix crenato; apice interdum decollato. Long., .32; long, spir., .15; lat., .15 
poll. (Carpenter.) 
Shell fusiformly ovate, yellowish-white, reticulated with pale brown, 
the interstices being of irregular shapes and sizes—or, in other words, it 
is pale brown, closely spotted irregularly with yellowish-white; epidermis 
very thin; apex eroded, remaining whorls 6, flatfish or scarcely convex, 
smooth, separated by a deep suture, giving the spire a slightly turreted 
aspect; last whorl feebly angular at the middle, contracted inferiorly, and 
striated around the extremity; aperture pale lilac within, occupying about 
three-sevenths of the entire length; outer lip arcuate, thickened, especially 
at the upper part; thin at the margin, and armed within the mouth with 
about 7 elongated tubercles; columella arched above, oblique at the base, 
with indications of one or two tubercles below the middle, covered with a 
thin whitish callosity; basal canal a little recurved. (Tryon, Manual of 
Conchology.) 
Type in Museum Gould. Type locality, Santa Barbara, California. 
Range. Kodiak, Alaska, to San Diego, California. 
This is the Nittidella dalli E. A. Smith. 
Nitidella luculenta Dali, 1919 
Proceedings of the United States National Museum, 56:331. 
Shell small, pale, with pale variations of brown or none, covered with 
a fibrous pale-brownish periostracum; with about six whorls, including 
an extremely minute smooth nucleus; suture distinct, not appressed; sur¬ 
face of the whorls moderately convex; axial sculpture none, but faint incre¬ 
mental lines; spiral sculpture only of a few spiral grooves on the back of 
the canal; aperture simple, the outer lip thin, not lirate within, body with 
a slight glaze, pillar thickened with an obvious keel on its anterior edge; 
canal short, wide; operculum normal. Height of shell, 7; of last whorl, 
5.5; diameter, 3.5 mm. (Dali.) 
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