42 FLORIDA GEOLOGICAL SURVEY-I5TH ANNUAL REPORT

Cerithium miiscarum Say (?) Crepidula plana Say. Crepidula fornicata (Linn6). Nucula proxima Say. Arca ponderosa Say. Arca campechensis Dillwyn. Arca subsinuata Conrad. Arca transversa Say (2 forms). Ostrea virginica Gmelin. Plicatula gibbcsa Lamarck. Anomia simplex Orbigny. Venericardia perplana Conrad. Venericardia tridentata Say. Chione cancellata Linn6. Chione grus (Holmes). Anomalocardia caloosana Dalil. Venus campechiensis Gmelin. Gemma purpura H. C. Lea. Parastarte triquetra Conrad. Tellina tampmnsis Conrad. Semele bellastriata Conrad ( ?) Abra mqualis Say (?) Tagelus divisus Spengler. Donax variabilis Say. Mulinia lateralis, var. corbuloides Reeve. Mulinia lateralis, vars. A. and B. Rangia cuneata Gray.
 Geologic horizon: Pleistocene.
 Three species, Arca campechensis Diliw., Geminma purpurca H. C.
Lea, and Donax variabilis, appear to be exclusively post-Pliocene.
 Arca subsinuata Conrad, hitherto, has been reported only from the Pliocene of the Croatan beds, near New Bern, Craven Co., N. C.