MOLLUSC A OF PORTO RICO. 
405 
Columbella ealligdypta, n. sp. Plate 57, fig. 13. 
Shell small, stout, solid, yellowish white, polished, with rather short and acute spire and about 
seven whorls; the nepionic whorls (missing) are followed by five subsequent whorls, at first smooth, then 
axially ribbed, and finally reticulated by spiral sulci; on the antepenultimate whorl the ribbing is 
close and feeble, on the penultimate clear-cut, slightly flexuous, with a presutural sulcus; on the last 
whorl the ribbing extends nearly to the canal, with two presutural grooves, and in front of them a 
space without spirals, then that part of the shell which would be covered by the advancing whorl is 
evenly, regularly, sharply grooved to the anterior end of the canal; the ril's are slightly flexuous and 
feebly nodular at the suture and are separated on the last whorl by gradually widening interspaces; 
the outer and pillar lips are both thickened and lirate within. 
Length, 6.5; maximum lat., 3.5 mm. 
A single specimen at Aguadilla, Porto Rico. 
This species belongs to the same group as A. obesa C. B. Adams, which is smaller, ruder, and 
much less elegantly sculptured. The color is probably variable; the type specimen seems more or 
less bleached. 
Subgenus Astykis H. & A. Adams. 
Shell generally small, smooth, usually polished. 
Columbella duclosiana d’Orbigny. 
Columbella duclosiana d’Orbigny, Moll. Cubana, ii, p. 136, pi. xxi, figs. 31-33, 1845, not of Sowerby, Thes. Conch., No. 8, 1847. 
Shell small, with six slightly rounded whorls, rather short, smooth and shining; outer lip with 
a slightly thickened varix, feebly notched above, smooth within; base of the shell but little contracted ; 
columella deeply excavated about at the middle; the few revolving ridges at the base are continued 
over it. Color white or yellowish white, sometimes maculated near the suture. 
Length, 3; diameter, 1.5 mm. 
Mayaguez, Porto Rico, one worn shell. 
This is close to C. luncita and may be only a variety of it. The name duclosiana was also used for 
a Columbella by Sowerby for a species from Java, which, if valid, will have to receive a new name. 
Columbella perpicta, n. sp. Plate 57, fig. 12. 
Shell of moderate size, rather thin, nearly smooth, elegantly fusiform, waxen white with brown 
flammulations; whorls seven, the latter ones with a faint striation just in front of the suture and 
somewhat stronger spiral sulci on the canal and base; body of the whorl without spiral sculpture; 
outer lip externally marginate, internally delicately lirate; pillar lip smooth or feebly obliquely 
striated near the canal. 
Length, 10.5; diameter, 4.5 mm. 
Mayaguez, Porto Rico, not uncommon in about 100 fathoms. 
The only Antillean species with which this can well be compared is C. saintpairiana Caillet, 
which is larger, of a different shape, and axially ribbed near the apex. 
Genus NITIDELLA Swainsori, 1840. 
Shell oval to elongated, smooth, rather solid, with elevated spire; aperture somewhat effuse 
below; outer lip slightly thickened and swollen in the middle, toothed within; operculum oval; 
nucleus subcentral. 
Nitidella nitidula Linnaeus. 
Buccinum nitidulum Linn., Syst. Nat., ed. x, p. 741, 1758. 
Columbella nitidula Sowerby, Genera, pi. XL, fig. 162, 1847. 
Shell oblong-oval, with about seven slightly convex whorls; spire moderately elevated; aperture 
elongate, narrow above, somewhat effuse below; outer lip thickened a little, thicker in the middle, 
where it is straight or faintly incurved, ascending the spire above, toothed within, the spaces between 
the teeth darker. There are two small, scarcely oblique ridges below the middle of the columella. 
Shell smooth and shining throughout, reddish-brown blotched and spotted with white, the light 
markings generally forming a faint band below the suture and below middle of body whorl. 
Length, 15; diameter, 8 mm. 
Aguadilla; Playa de Ponce; Hucares; Guanica, Porto Rico; many shells. 
