Page:American Seashells (1954).djvu/228

Trivia maltbiana Schwengel and McGinty Maltbie's Trivia Plate 2IZ North Carolina to Florida and the Caribbean. /4 to /4 inch in length, globose, slightly flattened above, and character- ized by its pale tannish pink, translucent color, by its fine riblets, and by having 24 to 28 ribs crossing the outer lip. Areas between the ribs are micro- scopically granular. Nuclear whorls visible through the last whorl. The dor- sal groove is slight and the riblets nearly cross it. Moderately common just offshore to 50 fathoms. Trivia quadripiinctata Gray Four-spotted Trivia Southeast Florida, Yucatan and the West Indies. % to Yk inch in length, very similar to siiffiisa, but smaller, brighter pink, and with 2 to 4 very small, dark red-brown dots on the center line of the back. Riblets very fine, 19 to 24 crossing the outer lip. A very common species frequently found on beaches with the color dots worn away and the pink background rather faded. The riblets on the back are never pustulose as they tend to be in suffusa, nor is there any fine color speckling. Trivia antillarinn Schilder Antillean Trivia Southeast Florida and the Antilles. % to /4 inch in length, characterized by its deep reddish or brownish purple color. Elongate-globular in shape. Riblets smooth. With or without a faint dorsal groove over which the riblets usually cross. Outer lip with 1 8 to 22 teeth. Dredged from 30 to 100 fathoms and rarely cast upon the beach. Formerly T. subrostrata Gray. Trivia candidula Gaskoin Little White Trivia Plate 2 ICC North Carolina to southeast Florida to Barbados. Vs, to ^ inch in length, characterized by its fairly globular shape, pure- white color, somewhat rostrate ends and by the smooth riblets that pass over the back. There is no dorsal furrow. Many specimens have only a few rather strong riblets of which 1 7 cross the inside of the outer lip. Another common form has more riblets (20 to 24 over the outer lip). It has been named leucosphaera Schilder {globosa of authors, not Gray). The forms intergrade. Trivia nix is also white, but is larger, more globose and with a strong dorsal groove interrupting the ribs.