402 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Length, 17; maximum diameter, 6.5 mm. 
Mayaguez, Porto Rico, two specimens. 
This species is near to P. candei, from which it differs by its smaller size, more delicate sculpture, 
proportionally deeper labial sinus, and absence of brown flammulation. In a specimen of P. candei 
of the same length as the adult P. oxyglyptus, the shell is more conical and the last whorl emphatically 
wider. 
Genus STRONGYLOCERA Morch, 1852. 
Shell with elevated, sharp spire, cancellated; the whorls slightly shouldered above; aperture 
long-ovate; outer lip somewhat thickened and lirate within, not emarginate below; columella sharply 
twisted and having one or two folds below. Operculum lozenge-shaped, pointed in front and behind, 
concentric with a nearly central nucleus, something like that of Buccinum. 
Strongylocera unicincta Say. 
Nassa unicincta Say, Journ. Acad. Nat. Sci. Phila., v, p. 211, 1826. 
Phos guadeloupensis Tryon, Man., Ill, p. 219, pi. lxxxiii, figs. 512,520,1881. 
Shell with eight or nine somewhat rounded, slightly shouldered whorls, with nearly straight, 
longitudinal, rounded ribs (about twelve on the last, whorl); these are crossed by alternately coarser 
and finer revolving ridges; outer lip thickened, strongly ridged within; base deeply notched; aperture 
long-oval; columella raised into a slightly elevated inner lip, with one revolving rib on its base and a 
faint one above it. To the left of the columella near the base there is a strong, low, revolving ridge 
that ends at the basal notch; parietal wall without a ridge above. Color varying from whitish or bluish 
white to light or dark brown. There is generally a narrow dark band below the shoulder, and there 
are often dark blotches at the suture. 
Length, 22; diameter, 11 mm. 
Ponce; San Juan; Fajardo, Porto Rico. 
This species has been placed in both Nassa and Phos, but the operculum is quite different from 
that of either. 
Genus ENGINA Gray, 1839. 
Shell oval-conic, thick, nodulous; spire acuminate; lip thick, denticulate within ; canal truncated; 
columellar border wrinkled. Operculum claw-shaped, summit sharp, the nucleus apical. 
Engina turbinella Kiener. 
Purpura turbinella Kiener, Coq. Viv. , p. 29, pi. ix, fig. 25, 1835. 
Shell rather short, seven-whorled, with a nearly straight, conical spire; there is a well-defined 
ridge or carina at the periphery, and below this the shell tapers evenly to the base; there is a row of 
low tubercles just above the suture, extending around the periphery of the last whorl, and these 
tubercles sometimes are continued as faint, longitudinal ribs; the surface is finely reticulated with 
delicate, revolving threads which cross the growth lines; aperture long-ovate, somewhat narrowed and 
drawn out below; outer lip thickened and varicose, with from four to six nodules within, the upper 
separated some distance from the others; under lip having a sharp, raised edge, and slightly nodulous- 
wrinkled. 
Color reddish brown to black. There is a white band at the row of nodules, which is often 
broken so that only the nodules are white. 
Length, 11; diameter, 7 mm. 
Ponce; Puerto Real; Aguadilla, Porto Rico; Ensenada Honda, Culebra; numerous dead and worn 
shells. 
Family NASSID2E. 
Genus NASSA Lamarck, 1799. 
Shell imperforate, solid, oval to elongated; spire pointed; aperture oval; lip thickened byavarix, 
lirate within; border of the columella reflected over the ventral part of the shell, often forming a 
heavy, widespread callus; columella twisted and truncate at the base, with a single fold below. Oper- 
culum oval or unguiform, its edges toothed, truncate at the apex, its nucleus apical. 
