Clathrodrillia albicoma: Shell solid, slender, acute, pure white, with a simple polished nucleus of a whorl and a half, followed by nine normal whorls; spiral sculpture of extremely fine, close-set, regular threads, uniform over the entire surface, but scarcely visibly developed in the first four whorls, which appear polished to the naked eye ; the threads on the last whorl are about nine in the breadth of a millimeter; transverse sculpture of rather stout, sharp ribs (on the seventh whorl ten) which extend from suture to suture, with a slight flexuosity near the suture, but no marked interruption for a fasciole; on the last whorl there are fourteen of these ribs, beside the large shouldered varix behind the aperture ; they extend well over the periphery of the whorl, and are evanescent on the canal; other transverse sculpture comprises only fine lines of growth which are not parallel to but more oblique than the aforesaid ribs, and reticulate prettily the spiral threads; whorls but little inflated, having a very regular taper, slightly appressed at the distinct but not deep suture ; aperture more than one third as long as the shell, polished within, with a deep broad notch, slightly in advance of the suture, whose edges are produced and considerably reflected ; the fasciole is indistinct and little depressed; the outer lip smooth, in the middle produced, internally somewhat thickened, not lirate ; canal short, rather broad, somewhat recurved; a broad, not very thick, continuous band of white callus from the end of the pillar over the body passes into the reflected margin of the notch ; pillar slightly curved. Long. of shell, 25.7 mm ; of last whorl, 10.6 mm; of aperture, 9.0; lat. of last whorl, 8.0 mm.

Clathrodrillia albicoma: Shell solid, slender, acute, white, with a simple, polished nucleus of a whorl and a half, followed by nine slightly convex whorls, which have rather strong, flexuous, longitudinal ribs that extend from suture to suture; spiral sculpture consisting of exceedingly fine, wavy threads; last whorl having a stout, high varix near aperture; aperture more than one-third the length of shell, narrowed below. Length, 26 mm; diameter, 8 mm.

Clathrodrillia albicoma: The species is very elegant in its slender taper and snowy whiteness.

Clathrodrillia albicoma: Gulf of Mexico.