i8o Bulletin 29 344 



Scapharca {Cunearca) cumanensis Dall 



Area incongrua Guppy, Proc. Sci. Assoc, Trinidad, p. 163, Dec, 

 1867; Geol Mag. London, p. 451, 1874. Not yL incongrua Say. 



Scapharca {Cunearca) cumanensis Dall, Trans. Wagner Inst. Sci., 

 vol. 3, pt. 4, p. 633, 1898. 



Described as a miniatured, incongrua but higher, shorter; 

 with more prominent and more anterior beaks, shorter hinge line ; 

 ribs of posterior slope of right valve smooth instead of nodulose. 

 Length 26, altitude 25, diameter 21 mm. 



Oligocene of Cumana (Guppy); island in Lake Henriquillo, 

 Southern Santo Domingo (Powell). 



Note. — Gabb described an Area multilineata from Santo 

 Domingo. This shell is characterized by its thin, globose form 

 and sixty small, square ribs. Gabb likens it in some respects to 

 A. centenaria. We have no representative of A . multilineata in 

 our collections and merely add this for completeness. A. Websteri 

 Brown and Pilsbry is an unfigured species from Haiti. 



Genus Glycimeris Da Costa 



Glycimeris acuticostata Sowerby 



Plate 26, Figure 12 



Pectunculus acuticostatus Sowerby, Quart. Jour. Geol. Soc London, 



vol. 6, p. 53. pi. 10, fig. 13, 1849. 

 Pectunculus acuticostatus Guppy, Id., vol. 22, p. 293, 1866. 

 Axinea acuticostata Gabb, Trans, Amer. Phil. Soc, vol. 15, p. 255, 



1873- 

 Pectunculus acuticostatus Guppy, Quart. Jour. Geol. Soc London, vol. 



32, p. 532, 1876. 

 Glycymeris acuticostata Dall, Trans. "Wagner Inst. Sci., vol. 3, pt. 4, 



p. 608, 1898. 

 Glycymeris acuticostata Brown and Pilsbry, Proc. Acad. Nat. Sci. 



Phila., p. 364, 191 1. 



A common species in the blue clays; characterized by its 

 slightly oblique form and sculpture of thirty sharp, narrow, radi- 

 ating ribs with concave, often angulated, interspaces. Length 

 24, altitude 23, semidiameter 7 mm. Also reported from Cu- 





