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258 American Seashells
Vs inch in length, resembhng a miniature apicimmt, but pure white in
color. Like Gibberulina ovuHforims, but the aperture is not so long and has
microscopic, spiral teeth inside the thin, curled-in outer lip. Columella with
4 oblique folds. Alias M. lavalleaiia Orb. Common in shallow water to 40
fathoms. The subgenus Granula Jousseaume 1874 is this subgenus.
Persicula jeivetti Carpenter Jewett's Marginella
Monterey, California, to Lower California.
/4 inch (5,0 mm.) in length, snow-white, glossy, rather stout. Apex
smoothed over and obscured. Outer lip smooth, slightly curled inward. Col-
umella with 3 or 4 rather distinct, slanting, spiral folds with several smaller
ones higher on the columella. Common from low tide to several fathoms.
There are 3 similar, small and white species which are very difficult to
separate; and according to some workers, size and proportionate dimensions
are of significance:
F. regzilaris Cpr. (Regular Marginella), Monterey to Lower California.
Length 3.3 mm., ratio of diameter to length i to 1.5. Low tide to
30 fathoms. Common.
P. subtrigona Cpr. (Triangular Marginella), Monterey to Lower Cahfornia.
Length 3.5 mm., ratio of diameter to length i to 1.25. Low
tide to 50 fathoms. Uncommon.
P. politula Dall (Polite Aiarginella), Santa Barbara to Lower California.
Length 3.0 mm., ratio of diameter to length i to 2. Low tide to 20
fathoms. Uncommon.
Genus Hyalina Schumacher 18 17
Subgenus Voharina Hinds 1844
Hyaliva avena Valenciennes Orange-banded Marginella
North Carolina to Key West and the West Indies.
Plate I ip; figure 56i
M to % inch in length, slender; spire pointed, but short. Outer lip curled
in, white and smooth. Aperture narrow above, wide below. 3 to 4 slanting,
columellar teeth. Color whitish, cream or yellowish with 4 to 6 spiral bands
of subdued orange-tan. A moderately common, shallow-water species. The
pink variety, especially common in Yucatan has been given the name beyer-
leana Bern.
Hyalina veliei Pilsbry Velie's Marginella
West coast of Florida.