287 Costa Rico Miocenk— Olsson 115 



Genus WIETULA H. and A. Adams 



SWetula cancellata Gabb Plate 10, Egure 12 



Metula cancellata Gabb, 1873, Trans. Amer. Phil. Soc, vol. 15, p. 



205. 

 Metula cancellata Gabb, 1881, Journ. Acad. Nat. Sci. Phila., vol. 8, 2nd 



series, p. 351. 

 Metula cancellata Dall, 1903, Trans. Wagner Free Inst. Sci., vol. 3, pt. 



6, p. 1584. 

 Metula cancellata Maury, 1917, Bull. Amer. Pal., vol. 5, 249, pi. 14, 



fig. 19. 



Less common in Costa Rica and Panama than the following 

 species and from which it is easily distinguished by its usual 

 smaller size, more delicate shell, and fine sculpture. 



The spiral threads on the last whorl nnml^er about 37 and 

 are crossed by nearly as fine longitudinal ribs. The resulting re- 

 ticulate sculpture is fine and neat. Our largest shell, a specimen 

 from Bocas with 6 whorls measures: 



Length 19, diameter 6.5, last whorl 14, spire 9, aperture 

 10 mm. * 



Gatun Stage: Bocas del Toro, Panama. 



Hill la, Banana River, C. R. 



Metula Gabbi Brown and Pilsbry Plate 10, figure 11 



Metula Gabbi Brown and Pilsbry, 191 1, Proc. Acad. Nat. Sci. Phila., 

 vol. 63, p. 351, pi. 25, figs. 4, 8. 



This beautiful species is fairly common in the Canal Zone, 

 but usually in a fragmentary condition. It related to the Metula 

 cancellata Gabb, differing mainly in its larger size and heavier 

 sculpture. On a speciman of 8 whorls from Gatun, the spirals on 

 the spire whorl number about 8 and 39 on the last whorl and an- 

 terior canal. The 2 upper spirals are noticeably stronger than 

 the others. Aperture long and narrow and finely denticulated 

 along the interior of the outer lip. 



