390 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Subgenus Mangilia s. s. 
Mangilia luctuosa d’Orbigny. 
Pleurotoma luctuosa d’Orbigny, Moll. Cubana, u, p. 255, pi. xxm, figs. 29-31,1845. 
San Juan, Porto Rico (Gundlacb); Cuba; Guadeloupe. This may not be a Mangilia. 
Mangilia quadrata Reeve. 
Pleurotoma quadrata Reeve, P. Z. S., 1845, p. 114; Conch. Icon., I, pi. xxvm, fig. 253, 1845. 
Shell short, fusiform, biangulate on the body whorl; surface covered with strong longitudinal ribs, 
there being about eight on the body whorl. The shell is cancellated with a set of sharp, revolving 
threads, that on the shoulder above being particularly strong; there are three of these threads on the 
body whorl that are stronger than the others, the lower one marking the lower angulation; those of 
the base becoming fainter; notch in the outer lip shallow; canal rather short. 
Length, 4.5; diameter, nearly 2 mm. 
Surface whitish, clouded with brown. 
Mayaguez, Porto Rico, many worn shells; off Boca Prieta, one dead shell. 
Two specimens of the variety quadrata were also obtained at Mayaguez. 
Mangilia lavalleana d’Orbigny. 
Pleurotoma lavalleana d’Orbigny, Moll. Cubana, n, p. 174, pi. xxiv, figs. 7, 9, 1845. 
A single specimen was obtained at Mayaguez that may be this species, but it is in bad condition 
and can not be determined with certainty. 
Mangilia sp. 
A single young, imperfect shell, something like M. rubella Kurtz & Stimpson, was obtained at 
Mayaguez. 
Mangilia melanitica Dali. Plate 58, fig. 10. 
Mangilia melanitica (Dali, MS.) Bush, Trans. Conn. Aead.Sci., vr, p. 459, pi. xiv, figs. 3, 3«, 1885. 
Shell with a rather slender spire and short base, with nine whorls, the iirst two rounded and 
smooth, the rest covered with revolving line, of which the median one is strongest, making the shell 
somewhat angular in the middle of the whorls and shouldered on the last whorl ; the four lower whorls 
have faint, slightly oblique longitudinal ribs; aperture much wider above than below; outer lip slightly 
thickened; the notch large, deep, and rounded, the lip surrounding it inflated into a raised rim. Color 
whitish, stained with brown, the aperture and base darker. 
Length, 4.5; diameter, 1.5 mm. 
Mayaguez, Porto Rico, many worn shells. 
Mangilia trilineata 0. B. Adams. 
Pleurotoma trilineata C. B. Adams, Contr. to Conch., p. 55, 1845; Tryon, Man., vi, p. 247, pi. xxi, fig. 31, 1884. 
Quebradillas, Porto Rico (Gundlach). 
Family CANCELLARI1D£. 
Genus CANCELLARIA Lamarck, 1822. 
Shell oval, generally cancellated; last whorl ventricose, with a short canal and strong siphonal 
fasciole; columella with several oblique plications. 
Type, C. reticulata Linnaeus. 
Subgenus Cancellaria s. s. 
Cancellaria reticulata Linnaeus. 
Valuta reticulata Linnaeus, Syst. Nat., ed. xn, p. 1190, 1767. 
Cancellaria reticulata Tryon, Man. Conch., vn, p. 69, pi. it, figs. 25, 26, 1885. 
Porto Rico (Gundlach) ; Florida. 
Subgenus Trigonostoma Blainville, 1827. 
Shell generally umbilicated, whorls wider and usually shouldered above; aperture trigonal; outer 
lip not contracted in front; canal obsolete. Type, Murex scala Gmelin. 
