The color is pale madder brown, more or less zoned in harmony with lines of growth, and with a peripheral and basal spiral paler band feebly indicated.

The space between the shoulder and the suture behind it is slightly impressed, smooth, or crossed by distant low sharp wrinkles, very narrow and not corresponding to the ribs.

Above, on the dome of the mantle, is attached the rectum, with an evenly tapered adherent termination and a longitudinally wrinkled subcylindrical lumen.

It has a smooth, rather tough, lining without any horny appendages, and is lubricated by the discharge of several muciparous glands of rather small size.

The proboscis proper is very short (in spirits), only about one-sixth as long as the pharynx, and therefore, unless capable of great extension in the living state, probably can not be extruded from the oral opening.

The pharynx of the specimen examined was partly filled with a dark-greenish matter, apparently of a mucous character, which showed no traces of organization, leading to the supposition that the pharynx was adapted to the engorgement of large masses of protoplasmic matter rather than the pursuit of living animals of a higher order, as in most Toxoglossa.

The modification is analogous to that by which Turcicula, a derivative from a phytophagous stock, has become adapted to gorging itself with large quantities of foraminifera, algae being absent from its habitat.

The tooth sac opens near the end of the proboscis, but being filled with coagulated mucus, and extremely reduced in size by degeneration, could not be discovered until the mass was boiled in caustic potash in the hope of finding some traces of teeth.

The form of the teeth is much like that of Bela; they are sharply pointed, translucent, and composed of a plate like the die for a steel pen folded closely upon itself with a U-shaped section.

The shaft is set in a chitinous yellow socket, which is extended on the back of the tooth so as to form a little hooked knob.

Behind the proboscis the alimentary canal continues with moderate size for nearly a whorl, when there is an inconspicuous enlargement corresponding to a stomach, with its inner walls longitudinally wrinkled and no marked pyloric curve.

The upper portion of the animal could not be extracted from the spire in spite of all efforts, and so great an advantage in this respect is given by the deep insertion of the columellar muscle, I was unable to withdraw any part of the animal in good condition until after cutting into the penultimate whorl with a file and severing the muscle with a fine scalpel.

This is a very interesting form, evidently related to some of Verrill's Fleurotomellae, but differing in important respects as may be seen by the generic diagnosis.