All known specimens of ostracodes from the Ordovician Highgate Formation of Vermont have been restudied and are illustrated photographically. In addition, three related species described by R. P. Whitfield in 1889 are redescribed and figured for comparision. Six species and one synonymous name are recognized: Isochilina eximia (= I. bilabiata), I. puteata, and I. tenuifila, all named by P. E. Raymond in 1937, from the Highgate; and I. cristata, I. gregaria, and I. seelyi, all of Whitfield.

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