270 Bulletin 39 44a 



Section BOTHROCORBULA, Gabb 



Corbula viminea Guppy Plate 28, figure 25 



Corbula viminea Guppy, 1866, Quart. Journ. GeoL Soc. London, voL 



22, p. 293, pL 28, fig. II. 

 Bothrocorbula viminea Gabb, 1873, Trans. Amer. PhiL Soc, vol. 15 



p. 247. 

 Corbula {Bothrocorbula) viininea'Da.W, 1898, Trans. Wagner Free Inst. 



Sci., vol. 3, pt. 4, p. 850. 

 Corbula {Bothrocorbula) viminea Maury, 191 7, Bull. Amer. Pal., vol. 



5, p. 397, pl- 39. figs. 20, 21. 



This is a very characteristic species, distinguished by its 

 large, deep lunule and its surface stronglj'- sculptured with 

 coarse, concentric, wave-like costse. It is known from the Mio- 

 cene of Jamaica and Santo Domingo. 



The Corbula hexacy^na Brown and Pilsbry, still known on- 

 ly from the Gatun of the Canal Zone is similiar in form and 

 sculpture but lacks the deep lunular pit. 



Length 15, height 10, semi-diameter 4.85 mm (right 

 valve) . 

 Gahcn Stage: Middle creek. 



