Page:American Seashells (1954).djvu/340

258 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 Cah- fornia. 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 Plate I ip; figure 56i North Carolina to Key West and the West Indies. 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.