4O STUDIES IN GEOLOGY, No. 3 



the length of the spire. Whorls about 9 in number, the sur- 

 face of each whorl inclined from the suture to a sharp keel, 

 from which it recurved to the suture. The spire is thus 

 turreted. The keel is waved, giving the spire a coronate 

 appearance.- Sculpture of slightly arcuate lines of growth 

 on the spire ; on the sides of the body whorl are spiral bands 

 separated by narrow interspaces. The lower bands are very 

 sharply defined, but they decrease in sharpness of definition 

 above. Faint lines of growth cross the bands. The aperture 

 is narrow. Height, 17; diameter, 10.75 Him. 



This species is similar to C. marginatus Sowerby 30 from 

 Antillean Miocene horizons, from which it differs in having 

 a higher spire, which is coronate, not smoothly keeled. C. 

 multiliratus var. gaza Johnson and Pilsbry 31 is similar to 

 both these forms ; it differs from berryi in being more taper- 

 ing, longer, with a proportionally lower spire, the whorls of 

 which are not coronately keeled. 



Lower Zorritos. Hervideras, Zorritos district. 



Conus cacuminatus n. sp. 



PLATE I Fig. 5. 

 Conus sp. ind. B. Nelson, Trans. Conn. Acad., vol. 2, p. 194, 1870. 



Shell large, moderately heavy ; the spire of medium height, 

 and the body whorl tapering gracefully in a straight-sided 

 cone. Whorls 9-10 in number; the 2^2 nuclear whorls 

 smoothly convex, and the remainder concave, with a smooth 

 keel at the outer edge just above the suture. Sculpture of 

 lines of growth, arcuate on the whorls of the spire, straight 

 on the body whorl and lamellose in worn specimens. The 

 best preserved specimen shows numerous very faint spiral 

 striae on the whorls, with a faintly impressed spiral line at 

 the deepest point of the concave whorl-surface. Near the 



30 Quart. Jour. Geol. Soc. Lond., vol. 6, p. 44, 1849; Maury, 

 Bull. Amer. Pal., vol. 5, No. 29, p. 46, pi. 7, fig. II, 1917. 

 81 Proc. Ac. Nat. Sc. Phila, vol. 63, p. 342, pi. 23, figs. 2, 3, 1911. 



