Menestho felix
Menestho felix is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. Description The broadly elongate-conic shell is turreted and subdiaphanous. It measures 2.6 mm. The whorls of the protoconch are small, almost completely obliquely immersed, only part of the last rounded volution is visible above the first of the later whorls. The 5½ whorls of the teleoconch are somewhat inflated, well rounded and moderately shouldered. They are marked by strong. equally developed. spiral keels which are separated by subequal, deep, rounded sulci. The latter are somewhat broader than the keels and crossed by many, very slender raised axial threads. Three keels are present upon the first and second, on the third a fourth keel appears partly at the suture, but the greater part of it is covered up by the summit of the succeeding volution. The penultimate whorl has four keels, the posterior one of which marks the summit and is a little wider than the rest and somewhat flattened. The periphery of the body whorl is marked by a sulcus. The base of the shell is well rounded and attenuated. It is ornamented like the spaces between the sutures,