The character of the test of members of the Lepidocyclinidae and Lepidocyclininae are reviewed. Generic distinctions are based primarily on characters of the megalospheric nucleoconch. All generic and subgeneric names are discussed, and the genera Lepidocyclina (subgenera Lepidocyclina and and Nephrolepidina) Eulepidina and Pliolepidina are adopted. Polylepidina belongs to the subfamily Helicolepidininae. An alternative treatment of species reclassified by Cole is suggested. A stratigraphically significant fauna from Trinidad is described. Age-determinations of some significant occurrences are revised.

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