404 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
or sometimes shouldered; the surface is covered with strong, revolving ridges, though occasional 
specimens are nearly smooth, and it is marked by rather strong growth lines, which are most 
conspicuous between the ridges. The outer lip is thick and is somewhat shouldered and ascending 
above; it is decidedly thickened and incurved in the middle, and strongly toothed within throughout 
its length. The columella has six or eight teeth and is callous, and usually biplicate within. The 
color pattern is infinitely variable; often white and brown or white and yellowish brown in irregular 
longitudinal clouds or zigzags. In many cases the dark color is found only on the ridges in dots or 
lengthened markings, and there are often two or more ridges with darker markings than the rest, or 
white and dark markings arranged alternately. 
Length, 15 to 22; diameter, 10 to 15 mm. 
San Juan; Aguadilla; Arroyo; Ponce; Mayaguez; Puerto Real, Porto Rico; Culebra. A small 
variety was obtained at Ponce and Boqueron Bay, Porto Rico. 
Subgenus Anachis H. & A. Adams, 1853. 
Shell oval fusiform, longitudinally ribbed; spire elevated; last whorl but little narrowed in front; 
outer lip nearly straight, crenulated within. 
Columbella pulchella Kiener. 
Columbella pulchella Kiener, Thes. Conch., i, p. 131, pi. xxxix, figs. 1‘21, 122, 1847. 
Shell with about eight slightly rounded whorls; spire acuminate, gradually tapering; delicately 
longitudinally ribbed, the ribs on the upper whorls strongest; covered throughout with fine, revolving 
lirse or threads; outer lip nearly straight in the middle, slightly thickened, nearly or quite smooth 
within, faintly notched above; columellar callus raised into a little lip at its edge, faintly nodulous. 
Color yellowish white variegated with brown, the brown pattern often inclosing rounded white spots 
of different sizes; there is generally an irregular white band just below the periphery. 
Length, 9; diameter, 3 mm. 
Playa de Ponce; Puerto Real, Porto Rico; Ensenada Honda, Culebra; Vieques. 
Columbella iontha Ravenel. 
Columbella iontha Ravenel, Proc. Acad. Nat. Sci. Phila., 1861, p. 42; Tryon, Am. Mar. Conch., p. 40, 1873; Man., v, p. 144, pi. 52, 
fig. 76(?) , 1883. 
Mayaguez, Porto Rico, one specimen. 
This may be identical with C. pretrei Duclos, which is probably prior to C. albella C. B. Adams 
(1850, as Pleurotoma), which appears to be merely a mutation of Duclos’ s species, as identified by 
cotypes from Adams. 
Columbella catenata Sowerby. 
Columbella catenata Sowerby, P. Z. S., 1844, p. 52. 
Columbella catenata Sowerby, Conch. Icon., xi, pi. xxi, fig. 119, 1858. 
Shell with about eight nearly flat whorls, sculptured with rather strong, straight, longitudinal 
ribs and faint revolving lirse; outer lip slightly notched above, and below this notch it is thickened. 
Within it there are five or six denticles. Base of the shell slightly contracted; columella with feeble 
nodules. Color dirty white with a supramedian and basal band of dark, tessellated markings. 
Length, 8; diameter, 3.5 mm. 
Mayaguez Harbor, one shell. 
Columbella obesa C. B. Adams. 
Buccinum obesum C. B. Adams, Proc. Bost. Soc. Nat. Hist., 1845, p. 2. 
Columbella obesa Tryon, Man., v, p. 169, pi. lvii, figs. 7-9, 20, 1883. 
Shell small, with nearly plain whorls, rather stout, sculptured with strong, straight ribs, which fade 
out on the back of the body whorl, and revolving threads; base contracted a little; outer lip varicose, 
feebly notched above and toothed within; columellar callus raised into an edge, smooth; yellowish 
or whitish, more or less banded with light or dark brown. 
Length, 5; diameter, 2.5 mm. 
San Juan Harbor, four specimens. 
