Six planktonic foraminiferal zones, which can be correlated with Trinidad, are identified from the New Jersey Eocene. Modification of Bolli's zonation was necessitated by the presence of interpreted mid-latitude elements.

1. Globorotalia subbotina-G. aequa Assemblage Zone. Diagnostic species are G. elongata G. pseudoscitula, Acarinina quetra, and Pseudohastigerina wilcoxensis.

2. Globorotalia formosa formosa Assemblage Zone. This zone contains the most fully developed fauna and is characterized by G. formosa gracilis and transitional forms to G. formosa formosa, with advanced forms of A. quetra and Globigerina prolata. Truncorotaloides rohri guaracaraensis (non Globigerninoides pseudodubia) also appears in this zone.

3. Subbotina inaequispira Range Zone (approximately coeval with Bolli's Globorotalia aragonensis zone). Pseudohastigerina sharkriverensis and Acarinina bullbrooki first appear in the upper part.

4. Pseudohastigerina sharkriverensis Assemblage Zone is coeval with Bolli's "Globorotalia" palmerae zone.

5. Subbotina frontosa Assemblage Zone. The lowest appearance of the zone species identifies the base of the zone and the base of the middle Eocene. Also present are Hantkenina aragonesis, H. dumblei, Globorotalia lehneri, and Truncorotaloides rohri rohri.

6. Turborotalia centralis Assemblage Zone. The zone species and Truncorotaloides topilensis range through this zone to the top of the section studied.

High percentages of the genus Acarinina and low percentages of species of keeled Globorotalia, together with mid-latitude species, indicate that the seas off New Jersey were temperate during the Eocene. Similar faunal elements have been found in Spain, Austria, and the Caucasus. Seemingly these faunas characterize the temperate-subtropical boundary, and corresponds closely to the paleobotanical evidence.

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