BUI.LKTIN 39 



with both valves comes from the Gatun of Water Cay. It is 

 quite unHke any other known American species. 



It is named for Dr. A. C. Veatch, Director of the Explora- 

 tion Department of the Sinclair Consolidated Oil Corporation. 



Gatun Stage: Water Cay. 



Mt. Hope, C. Z. 



Area auriculata Lamarck Plate 22, figure 3 



Area auriculata Lamarck, 1819, n. s. Vert., vol. 6, p. 43. 

 Area {Seapharea) aufieulata Dall, 1898, Trans. Wagner Free Inst., 



Sci., vol. 3, pt. 4, p. 649. 

 Area auriculata, Sheldon, 1916, Paleont, Amer., vol. i, p. 50, pi. 11. 



fig- 19. 



Scapharea auriculata Maury, 1917, Bull. Amer. Pal., vol. 5, p. 339, pi. 

 28, fig. 3. 



A common, recent species of the West Indies. Its hinge- 

 line is generally produced or auriculated at its posterior extrem- 

 ity. 



It occurs in the Miocene of Jamaica and Santo Domingo. 

 Dall also records it from near Limon. 



The Costa Rican specimens in our collection are all small 

 but otherwise typical. 



Gatun Stage: Coll. j, Hone Walk Creek. 



Old Man Sam Creek, i mile south of the beach. 



Section CUNEARCA Dall 

 Area cacica, n. sp. Plate 24, figure I 



Shell of moderate size, strongly convex and with high, in- 

 flated umbos; beaks and umbos about the middle of the shell; 

 the greatest convexity of the shell lying about the anterior 1-3, 

 and with a narrow but deep, radial depressed zone extending 

 from the beaks to the ventral margin, just anterior to the um- 

 bonal angle; the anterior end is slightly rounded, the posterior 



