430 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Litorina, ziczac var. lineata Lamarck. 
Phasianella lineata Lamarck, An. sans Vert., vn, p. 54, 1822. 
IJltorina ziczac var. lineata Tryon Man., ix, p. 251, pi. xlv, fig. 7. 
Shell smoother than the type, the whorls more convex and less sharply angulate at the base. 
The color pattern is generally less distinct than in the ziczac. 
Aguadilla; San Juan; Hucares; Puerto Real, Porto Rico. 
Litorina tessellata Philippi. 
Littorina tessellata Philippi, Abbild. und Beschr., Heft vm, p. 220, pi. v, fig. 26, 1847. 
Shell with convex whorls, which are sometimes slightly shouldered above, and a sharp apex, the 
suture plainly marked; last whorl bluntly angulated at base, sculptured throughout with delicate, 
evenly spaced grooves; aperture irregularly oval, the lip extending above angle of penultimate whorl; 
columella flattened, ending in a ridge below, behind which the parietal wall is excavated. Color 
bluish or greenish white, alternating with square, brown tessellations, the tessellations in oblique or 
zigzag rows; aperture brownish purple, the inside of outer lip showing the outside color pattern. 
Length, 15; diameter, 10 mm. 
Ensenada Honda, Culebra, two specimens. 
This species resembles L. ziczac in many respects, lint is rather shorter in proportion, has more 
rounded whorls, which are often slightly shouldered above; the aperture is more purplish and has no 
white band within. 
Litorina angulifera Lamarck. 
Phasianella angulifera Lamarck, An. sans Vert., vii, p. 54, 1822. 
Littorina scabra var. lineata Tryon, Man., ix, p. 243, pi. xm, figs. 11-13, 15-17, 1887. 
Shell thin, with rounded whorls and a sharp-pointed spire; the surface everywhere covered with 
line, revolving, engraved lines, which are sometimes so near together that the ridges between them 
appear as close revolving threads; surface generally slightly decussated by the growth lines; aperture 
nearly evenly oval; outer lip thin; columella often a little excavated below. The color pattern varies 
greatly; the ground may be gray, yellowish, reddish, or purplish, and is generally marked with darker, 
oblique strigations, which are often only faintly defined; columella usually tinted with violet. 
Length, 30; diameter, 17 mm. 
Ponce, Porto Rico; Ensenada Honda, Culebra; a small, slender, light-colored variety was 
obtained at San Juan, Porto Rico; West Indies; Florida. 
Litorina columellaris d’Orbignv. 
Littorina columellaris d’Orbigny, Voy. Am<5r. M6r., p. 392, 1840; Moll. Cubana, I, p. 213, pi. xm, figs. 18-20, 1841. 
Shell rather solid, sharp-pointed, with rounded whorls, the last generally compressed or a 
little concave just below the suture, covered everywhere with fine, revolving threads, and slightly 
decussated by growth lines; aperture suboval; outer lip not greatly thickened; columella wide, 
nearly straight, excavated below. Color yellowish to ashy, the upper whorls marked with darker 
color, in tessellations, lines, or clouds; columella purple. 
Length, 25; diameter, 16 mm. 
San Juan, Porto Rico; many young shells; West Indies; mainland of northern South America to 
Mexico. 
Often close to L. angulifera, but a solider shell, with a wider, straighter columella. 
Section LITORINA s. s. 
Litorina guttata Philippi. 
Littorina guttata Philippi, Abbild. und Beschr., n, p. 197, pi. IV, fig. 7, 1847. 
Quebradillas, Porto Rico (Gundlach). 
Litorina mespilum Muhlfeld. 
Helix mespilum Muhlfeld, Verb. Berl. Ges. Nat., I, 1824, p. 219, pi. vili, fig. 8. 
San Juan, Porto Rico (Gundlach). 
Genus TECTARIUS Valenciennes, 1833. 
Shell perforate or imperforate, turbinate, solid, subconic, tuberculous or spinose; spire pointed; 
aperture oval, entire; operculum paucispiral. 
