Shell large, slender, glandiniform, with a typical brown Sinusigera nucleus of three and a half whorls, followed by eight normal whorls; color 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 pillar in the young stained with a darker brown, or pinkish white in the full-grown shell; spire rather pointed, the apical whorls sculptured with incised spiral grooves below the shoulder and with numerous small oblique riblets over which the grooves run; the space between the shoulder and the suture behind it slightly impressed, smooth, or crossed by distant low sharp wrinkles, very narrow and not corresponding to theffibs. All this sculpture becomes rapidly obsolete, and on the greater part of the shell the sculpture is contiued to silky lines of growth, faint traces of obscure spiral lines, and a few feeble narrow threads on the base and canal under a pale thin epidermis. The last whorl is compressed at the periphery, as in Glandina parallela, giving the body whorl a subcylindric aspect; suture appressed; aperture long, rather narrow, internally smooth, and with very little callus on the pillar or body; outer lip sharp, emarginate before and behind and arched forward in the middle; pillar obscurely thickened behind, attenuated anteriorly, as long as the canal, straight, but slightly twisted; canal and anal emargination wide and shallow; length of an adult, 75; of the aperture, 45; width of the shell at the posterior angle of the aperture, 20 mm.; length of the figured specimen, 45 mm.