223 Costa Rico Miocknk — Ols.son 51 



related to the recent Conus Stivipsoni Dall from the Florida 

 Straits. (Proc. U. S. Nat. Mus., vol. 24, p. 503, pi. 29, fig. 7, 

 1903). 



Surface of whorls are heavily sculptured with 25, 30 or 

 more subequal spiral cords. Upper surface of whorls, fiat or 

 slightly concave and with 3 or more spirals. The shoulder is 

 sharp and bounds a rather high, conic spire. 

 Length 31, breadth 16 mm. 



Gahtn Stage: Port Limon. 



Conus pSaniliratus, var. bocasensis, n. var. Plate 3, fig. 14, 16 



Shell of medium size, solid with a broad, stubby outline; 

 spire low, conic with nearl}^ straight sides and composed of seven 

 or more whorls; the ist 4 or 5 post-nuclear whorls are coronated; 

 spire-whorls with 3 faint spirals and curved growth-lines; body- 

 whorl large and wide, with 25 strong but somewhat irregular 

 simple spiral cords; their interspaces are wide and with crowded, 

 raised lines of growth and sometim.es intercalated spirals; anter- 

 ior canal nearh^ straight. 



Length 32, breadth 17 mm. 



This Cone, which should probably be considered as distinct, 

 is fairl};- common in the shale beds, belonging to the Gatun 

 Stage on Bocas Island. From typical planiliratusiX differs in its 

 broad stubbj' form and coarse sculpturing. 



Gatun Stage: Bocas del Toro, Panama. 



Conus marginatus Sowerby Plate i, fig. 20 



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



vol. 6, p. 44. 

 Canus marginatus Gabb, 1873, Trans. Amer. Phil. Soc., vol. 16, p. 



230. 



Conus marginatus Guppy, 1876, Quart. Jour. Geol. Soc. London, vol. 

 32, p. 528, pi. 29, fig. 5. 



Conus marginattcs Maury, 1917, Bull. Amer. Pal., vol. 5, p. 210, pi. 7, 

 fig. II. 



