MOLLUSCA OF PORTO RICO. 
447 
Family HEUCINHLE. 
Shell turbinated, heliciform, or globular; spire short; aperture semicircular; interior walls 
absorbed by the animal; operculum horny or calcareous, nonspiral. 
Genus HELICINA Lamarck, 1799. 
Shell imperforate, having a callus on the inner wall of the aperture; whorls few, peristome 
thickened, reflected; operculum corneous or shelly. 
Type, H. neritella Lamarck. 
Helicina vinosa Shuttleworth. 
Helicina vinosa Shuttleworth, Diagn. neue Moll., 1854, p. 92. 
Helicina vinosa Sowerby, Conch. Icon., xix, pi. xiv, fig. 118, a, b, 1873. 
Porto Rico; Vieques. 
Helicina umbonata Shuttleworth. 
Helicina umbonata Shuttleworth, Diagn. neue Moll., p. 93, 1854. 
Porto Rico. 
Helicina hjalmarsoni Pfeiffer. 
Helicina hjalmarsoni Pfeiffer, Mai. Bliitt., Ill, 1856, p. 50. 
Helicina hjalmarsoni Sowerby, Conch. Icon., xix, pi. xxv, fig. 223, 1873. 
Arecibo; Ponce; near Utuado, Porto Rico. 
Helicina striata Lamarck. 
Helicina striata Lamarck, An. sans Vert,, vi, p. 103, 1822. 
Helicina striata Sowerby, Conch. Icon., xix, pi. xxii, fig. 191, 1873. 
Porto Rico, several localities. 
Helicina subfusca Menke. Plate 54, fig. 6. 
Helicina subfusca Menke, Synopsis, 1828, p. 79. 
Shell depressed globose, with distinct growth striae, amber colored to brownish; whorls five and a 
half, nearly flat or sometimes having a faint revolving depression at some distance below' the suture; suture 
distinct but not deep; periphery rounded or slightly subcarinate; aperture semicircular, outer lip 
sharp; basal callus granular. 
Height, 7; diameter, 9 mm. 
Under rocks in pastures, Bayamon, Porto Rico, and also at St. John and St. Thomas. 
Helicina fasciata Lamarck. 
Helicina fasciata Lamarck, An. sans Vert., vi, p. 103, 1822. 
Helicina fasciata Sowerby, Conch. Icon., xix, pi. ix, fig. 73, 1873. 
Porto Rico; St. John; possibly found in some of the Lesser Antilles. 
Helicina phasianella Sowerby. 
Helicina phasianella Sowerby in Pfeiffer, Mai. Bliitt., in, p. 50, 1856. 
Helicina phasianella Sowerby, Conch. Icon., xix, pi. xxx, fig. 270, 1873. 
Vega Baja; Aguadilla, Porto Rico; Vieques. 
Helicina trochulina d’Orbigny. 
Helicina trochulina d’Orbigny, Moll. Cubana, I, p. 249, pi. xx, figs. 10, 12, 1841. 
Helicina trochulina Sowerby , Conch. Icon., xix, pi. xvi, fig. 138, 1873. 
Porto Rico. 
Helicina foveata Pfeiffer. 
Helicina foveata, Pfeiffer, P. Z. S., 1853, p. 35. 
Vieques; St. Thomas. 
Genus STOASTOMA C. B. Adams, 1849. 
Stoastoma portoricense Pfeiffer. 
Stoastoma porloricense Pfeiffer, Mai. Bliitt., iii, p. 51, 1856. 
Manati, in the Delicias plantation, Porto Rico. 
