I40 Bulletin 39 313 



small and curved to the left; anterior sinus small and round- 

 ed. 



lyength 39, basal diameter 25, height or vertical diame- 

 ter 17 mm. 

 A small shell with strongly depessed and angulated sides. 

 Collected from the coral limestones of Port L,imon. 

 Gatun Stage: Port Limon, 



Cpyraea cf. dominicensis Gabb 



Cypraea Dominicensis Gabb, 1873, Amer. Phil. Soc, vol. 15, p.. 



236. 

 Cypraea dominicensis Maury, 1917, Bull. Amer. Pal., vol. 5, p. 280, 



pi. 19, fig. II 



Our collection contains a single, fragmentarj^ shell from the 

 coralline limestones near I^imon. This specimen agrees closelj^ 

 with the Dominican shell figured by Dr. Maury as C. doniinicen' 

 sis f. It is characterized by its very thin shell, cylindroid form 

 and straight, evenly denticulated apertrue. 



Length 28, height 12 mm, 

 Gatun Stage: Port Limon. 



Cypraea cinerea Gmelin Plate 12, figure 8 



Cyptaea ci^ierea Gmelin, 1792, Syst. Nat., p. 3404. 



Cypraea cinerea Reeve, Icon., vol. 3, pi. 22, fig. 124. 



Cypraea cifierea Gabb, i88r, Journ. Acad. Nat. Sci. Phila., vol. 8, 2nd 

 series, p. 360. 



The Cypraea cinerea is a common, small species of Cowry 

 shell along the north coast of Panama and Costa Rica. Several 

 small Cypraeas were collected from the Gatun sandstones of 

 the Rio Blanco which cannot be distinguished from recent ex- 

 amples of cinerea. 



Gatun Stage: Rio Blanco. 

 Cypraea aimirantensis, n. sp. Plate 12, figure 9 



Shell large, heavy and rather high; the outlines of the shell 



