Olivella cocosensis
"Similar to O. gracilis in color and general chracters but much smaller (specimens in the type lot not exceeding 11 mm.), the spire shorter, its whorls more heavily calloused. Whorls about 6, of which the first two are glassy and form the small, elevated and projecting nucleus. The color may be a plain white but more often mottled with brown, the general pattern that of Olivella gracilis and nivea; this consisting of an upper darker band bordering the suture and a lower darker hand bordering the fasciole, the area in between mottled more lightly with brown flecks. Fasciole porcellaneous white, the surface of the spire-whorls similar. The pillar structure, as in gracilis, consists of about 7 lirations along the inner lip, some of which may be paired. Length 9.8 mm., diameter 4 mm.". Recent. Cocos Island, Chatham Bay.
