MOLLUSCA OF PORTO RIOO. 
441 
This species is similar in many respects to the other known members of the genus, and perhaps 
most like C. rcithbuni, but has a different sculpture, the C. raihbuni showing none of the curious 
vermiculate or sagrinate markings. The animal is blind, with a large verge projecting from the right 
tentacle and the ctenidium carried over so that it appears to spring from the right side of the animal. 
There are two rather long epipodial processes between the mantle and the foot behind. 
Family PHASIANELLID4E. 
Genus PHASIANELLA Lamarck, 1804. 
Shell generally imperforate, without epidermis, porcellanous, bulimiform, usually polished and 
variegated with bright colors. Aperture entire; operculum solid, calcareous, internally paucispiral, 
with the nucleus near its base, externally white and convex. 
Phasianella umbilicata d’Orbigny. 
Phusifinella Hinbilicatci d'Orbigny, Moll. Cubana, it, p. 77, pi. xix, figs. 32, 34, 1842. 
Shell small, with live to live and a half rounded whorls; suture deep; sometimes sculptured 
with revolving lines, at others smooth; sometimes the whorls are slightly angular on account of the 
prominence of one or more of the revolving lines; last whorl obscurely angular below; aperture short, 
oval; umbilical area perforated. Color whitish, dotted with reddish or brownish, with longitudinal or 
zigzag reddish or brownish streaks. 
Height, 5; diameter, 3 mm. 
Vieques, one shell. 
Phasianella tessellata Potiez & Michaud. 
I'hasianella tessellata Potiez & Michaud, Galerie de Douai, i, p. 312, pi. xxix, figs. 7, .8, 1838. 
Shell solid, smooth, ovate; apex obtuse; whorls four or five, somewhat convex, the last large and 
obtusely angulate on the periphery; aperture oblique, ovate; columella with a white callus; umbilical 
region excavated, often perforate. Color white, yellow, or reddish, longitudinally clouded with white, 
red, or brown, encircled with close, narrow, revolving and obliquely descending orange or red lines. 
Height, 5.5; diameter, 3 mm. 
Mayaguez, Porto Rico, one broken shell. 
Family TURBINIlhE. 
Genus TURBO Linnaeus, 1758. 
Shell turbinate or depressed, nacreous, with or without an umbilicus, the young not carinate or 
spinose; base convex; operculum flat, or concave within, paucispiral, but having a multispiral nucleus, 
the outside convex, smooth, tuberculate, or with concentric ribs. 
Turbo castaneus Gmelin. 
Turbo castcinea Gmelin, Syst. Nat., p. 3595, 1792. 
Turbo castaneus Pilsbry, Man., x, p. 203, pi. xlv, figs. 88-90. 1888. 
Shell turbinate, with five to six and a half whorls which are generally rounded, imperforate, 
and having a round aperture; the sculpture consisting of revolving, nodulous ridges everywhere 
closely set; two of these on the upper whorls and three on the body whorl are stronger than the rest, 
and often rise into knobs or vaulted scales, making the shell somewhat angulate. There is often a 
row of knobs just below the suture; columella thickened and rounded, the base of the shell projecting 
a little. The color pattern is much diversified, the ground being gray, orange, orange brown or 
greenish variously blotched with whitish. The operculum is chestnut colored within. 
Height, 30; diameter, 23 mm. 
Boqueron Bay; Ponce Reefs; Puerto Real; Fajardo; Mayaguez; Catona; San .Tuan; (Tuanica, Porto 
Rico. An abundant, widely distributed form. 
Genus ASTRALIUM Link, 1807. 
Shell trochiform, more or less flattened below, sometimes depressed above; the young shell is 
always carinated and spinose at the margin; operculum oval or oblong, with generally submarginal or 
terminal multispiral nucleus, usually with one to several external ribs. 
