PLATE 3 



Area umbonata Lamarck. Florida Keys. 1.5 i 



Area Incongrua Say. Wilbur, Florida. 2 inches. 



Area adamsi E. A. Smith. Florida Keys. 12 mm. 



Area reticulata Gmelin. Florida Keys. 15 mm. 



Area secticostata Reeve. Sanibel, Florida. 3. 



Area ehemnitzi Philippi. St. Thomas, W. I. 1. 



Area oecidentalls Philippi. Sanibel, Florida. 



Area auriculata Lamarck. Bahamas. 40 mm. p. 



Mulinia lateralis nucleus Conrad. Connecticut. 



Mulinia lateralis corbuloides Desh. Mayport, Florida. 16 mm. p. 65. 



