42 



Bulletin 39 



below which is a band composed of four smooth, close spirals; be- 

 tween these spirals and the keel is a deep, concave zone; pillar 

 nearly straight and smooth, with a single sharp keel on the 

 back. 



Length 20, diameter 4.75 mm. 



Of this interesting and distinctive species, we have only a 

 single, imperfect specimen from the Gatun beds of Pumbri 

 Creek. The three rows of tubercles are evenly spaced and there 

 is no sutural band. 



Gatiin Stage: Pmnbri Creek, C. R. 



Genus CONUS Linne 



Conus molis Brown and Pilsbry Plate 2, figures i, 2 



Conus molis Brown and Pilsbry, 191 1, Proc. Acad. Nat. Sci. Phila., 



vol. 63, p. 343, pi. 23, fig. I. 

 Conus molis Maury, 1917, Bull. Amer. Pal., vol. 5, p. 200. 



This is the common Cone in the Gatun beds of Panama and 

 Costa Rica and large specimens may reach a length of nearly 1 50 

 mm. The upper surface of the whorls carry 5 or more fine 

 spirals and perfect examples of young shells have a few of the 

 early post-nuclear whorls finely coronated. Described by Brown 

 and Pilsbry from the Canal Zone, the species has also been col- 

 lected b}^ us at several stations along the Panama coast between 

 Colon and Bocas, at Water Cay, and along the Banana River in 

 Costa Rica. A large specimen from Water Cay measures: 

 length 144 mm, width 81 mm. 



Gatun Stage: Gatun, Water Cay, Banana River, etc. 



Conus Stenostomus Sowerby Plate 3, figure 2 



Conus stenostoma Sowerby, 1849, Quart. Jour. Geol. Soc. London, 

 vol. 5 p. 44. 



Conus stenostoma Guppy, 1866, Id., vol. 22, p. 287, pi. 16, fig. 2. 

 Conus stenostoma Gabb, 1873, Trans. Amer. Phil. Soc, vol. 15, p. 

 230. 



