335 Costa Rica Miocene— Oi,sson 53 



faint arcuate lines of growth and very indistinct spirals; the 

 earlier whorls have a carinated suture but are only very faintly 

 coronated; last whorl heavily sculptured with about 20, wide, 

 even spiral bands, separated by grooves of about 1-3 of their 

 width; these grooves are faintly incised by the longitudinal 

 lines of growth; the spiral bands are slightly wider above 

 and smooth, becoming granulated on the canal; this granulation 

 appears on the posterior side of the bands only; aperture long and 

 narrow. 



Ivcngth 36, diameter 14.5 mm. 



33 (apex broken) diameter 15 mm. 



The original specimen of Comts Btirckhardti was described 

 from the Miocene of Mexico, State of Oaxaca. Our specimens 

 from Panama and Costa Rica are a little larger, but show the 

 characteristic high, smooth, spire and strong, flat, spiral bands of 

 the body-whorl. 



Conus tortuosopundatus Toula is a similiar but smaller 

 species. The difference in sculpture of the two species may be 

 seen in the accompanying figures, the spiral bands of tortiioso- 

 pundatiis being double or incised, while in Biirckhardti, they are 

 broad and simple. 



Gatiin Stage: Water Cay, Panama. 



Zone 2, East Grape Point Creek. 



Conus Harrisi, n. sp. Plate 3, fig. i 



vShell of moderate size, subcylindric with a high, even, conic 

 spire; spire-whorls about 6 plus, flat, with close sutures, except 

 for the upper whorls which are slightly carinate; the surface of 

 the spire-whorls is nearly smooth, except for a few faint spirals; 

 the last or body whorl is strongly sculptured with widely spaced 

 and sub-regular grooves; these grooves form about 14 wide, 

 spiral bands about the lower 3-4th of the last whorl; the upper 

 4th below the shoulder angle forms a wide, smooth band; below, 

 the spiral bands are generally smooth except those about the lower 



