396 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Family VOLUTID.C. 
Genua VOLUTA (Linnaeus, 1758) Lamarck, 1799. 
Voluta musica Linnaeus. 
Voluta musica Linnaeus, Syst. Nat., ed. x, p. 733, 1768; Reeve, Conch. Icon., vi, pi. viii, 1849. 
San Juan, Porto Rico (Gundlach); West Indies. 
Family TURBINELLID93. 
Genus TURBINELLA Lamarck, 1799. 
Subgenus Yasum Link, 1807. 
Turbinella muricata Born. 
Voluta muricata Born, Mus. Vind., p. 233, 1780. 
Turbinella muricata Reeve, Conch. Icon., iv, pi. vn, fig. 35,1847. 
Mayaguez, Porto Rico (Gundlach); West Indies; Florida Keys. 
Family MITRID/E. 
Genus MITRA Lamarck, 1799. 
Shell solid, fusiform; spire elevated, pointed; aperture narrow, notched in front; outer lip not 
reflected, thickened and smooth within; columella transversely, somewhat obliquely plicate; no 
operculum. 
Mitra barbadensis Gmelin 
Voluta barbadensis Gmelin, Syjt. Nat., p.3455, 1792. 
Mitra picta Reeve, Conch. Icon., ir, pi. xvi, fig. 123, 1844. 
Shell with about eight nearly flat whorls, covered with somewhat distant, raised, revolving 
thread#; besides this the surface is covered with a pattern of microscopic revolving and longitudinal 
lirte, making the spaces between the larger threads decussated; suture shallow, but well marked; 
aperture elongated, wider below; columella with four whitish plaits, the lower one quite faint. Color 
light brown, sometimes with longitudinal white bands, and often blotched with white. 
Length, 35; diameter, 13 mm. 
Guanica, Porto Rico; Caballo Blanco Reef, Vieques. 
Mitra nodulosa Gmelin. 
Voluta nodulosa Gmelin, Syst. Nat., p. 3445, 1792. 
Mitra granulosa Reeve, Conch. Icon., ii, pi. ix, fig. 62, 1844. 
Shell with about ten whorls, which are scarcely rounded but are narrowly shouldered above; 
suture distinct, impressed; surface sculptured by longitudinal ribs, which are cut by revolving furrows 
into coarse, rounded nodules, there being four of these furrows on the upper whorls and twelve on the 
body whorl; aperture scarcely widened below; basal notch deep; columella with four plaits, the upper 
strong, the lower faint. Color varying from pale to dark brown; the teeth whitish. 
Length, 35; diameter, 13 mm. 
Aguadilla, Porto Rico, one young shell. 
Mitra hanleyi var. gemmata Sowerby. 
Mitra gemmata Sowerby, Thes. Conch., sp. 334, fig. 649, 1874. 
Shell somewhat biconic, with about seven whorls, there being a single row of strong, somewhat 
longitudinal nodules on the center of the whorls; above the nodules the shoulder is slightly concave; 
the surface is sculptured with faint, longitudinal riblets crossed by almost obsolete microscopic striae; 
aperture rather short, slightly drawn out below; columella with three plaits. 
General surface purplish black or very deep brown; the large nodules on center of whorls are white. 
Length, 7; diameter, 3 mm. 
Ensenada Honda, Culebra, two young shells. 
A beautiful little form, probably a variety of Mitra hanleyi Dohrn (1862), not of Sowerby (1S74). 
