116 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



Localities. Antigua, Spencer; Crocus Bay, Anguilla (sta. 6965), 

 Vaughan. Occurs also at Bainbridge, Tampa, and Canal Zone (sta. 

 5901, 2 miles south of Mitchellville, P. R. R.). 



Geologic horizon. Oligocene. 



Type. Wagner Institute, Philadelphia. 



Figured specimens. U. S. Nat. Mus. Nos. 166982, 166984. 



Orthaulax inornatus Gabb. 

 (Plate 2, Figures 1, 2.) 



Orthaulax inornatus Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p. 272, plate ix, figs. 3, 4, 



1872. 



Orthaulax inornatus Gabb, Trans. Amer. Phil. Soc., n. s., Vol. XV, p. 234, 1873. 

 Orthaulax inornatus Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 520, plate 28, fig. 8, 



1876. 



Orthaulax inornatus Dall, U. S. Nat. Mus. Bull. 90, p. 86, plate 11, fig. 4, 1915. 

 Orthaulax inornatus Dall, Proc. U. S. Nat. Mus., vol. 51, p. 509, plate 88, fig. 9, 1916. 

 Orthaulax inornatus Maury, Bull. Amer. Pal., vol. 5, p. 285, plate 47, fig. 11, 1917. 



The following is Gabb's description of this species (1873) : 



"Shell broadly rounded-fusiform. Young shell with the spire a little 

 shorter than the aperture, suture impressed, whorls numerous, nuclear whorls 

 three, the subsequent ones showing faint traces of occasional thickenings 

 disposed like the varices of Triton; surface smooth; anterior end of body 

 whorl marked by a few faint revolving lines, no posterior canal. Adult shell 

 more distinctly fusiform, the spire covered with a longitudinally striated 

 incrustation covering the sutures and extending to the extreme apex. Aper- 

 ture elongated, acute behind and prolonged into a very narrow posterior canal 

 running straight to the apex; in advance it is gradually narrowed, the anterior 

 notch broad and shallow; inner Up thinly encrusted; outer lip thin in all my 

 specimens, and apparently thin, straight and entire in the perfect adult. Size 

 of largest specimen, length 3.75 inches, width 1.5 inches." 



Two broken specimens, much larger than any previously figured, 

 were obtained in Cuba. As one would expect of shells of this type, 

 the apical angle of the adult shell is much more obtuse than that of the 

 immature specimen. The faint revolving lines on the anterior end 

 extend posteriorly to the position of maximum diameter of the whorl. 

 In other respects, the Cuban fossils resemble those from Santo Domingo 

 and Florida. 



Localities. Consolacion del Sur, Pinar del Rio, Cuba, station 3474, 

 the Alcalde, coll.; Santo Domingo; Tampa; Bainbridge. 



Geologic horizon. Oligocene. 



Type. Philadelphia Academy. 



Figured specimens -U '. S. Nat. Mus. No. 166980. 



Cerithium herculeanum, new species. 

 (Plate 1, Figure 7.) 



The following is a description of this species: 



Shell large, broad at the base; decollated, 10 subsequent whorls; spiral 

 sculpture from anterior to posterior as follows: 1 inconspicuous thread adjacent 

 to the suture; 1 row of nodes becoming acuminate on the larger whorls; 2 low, 



