Chrondropoma dentatum (Say).
Plecotrema cubense (Pfr.).
Blauneria heteroclita (Mont.).
Microtralia minuscula (Dall).
Truncatella clathrus Lowe.
Truncatella caribæensis pulchella Pfr.
Truncatella bilabiata Pfr.
Littoridina monroensis (Ffld.).
Paludestrina? sp.? A single specimen that I can not approximate to any of the described species.
This is the first record, I believe, for Plecotrema cubense from the mainland of Florida. Originally described from Cuba, it was listed from the Bermudas by Dr. Pilsbry in 1900, (Trans. Conn. Acad., X, p. 504, pl. lxii, fig. 11), and there figured by him for the first time. Both he and Mr. John B. Henderson inform me that they have collected it on several of the Keys and I am indebted to both of them for the opportunity of comparing my specimen with theirs.