130 Bulletin 29 294 



which has much more deeply excavated whorls. 



Locality. — (Exp'd '16) Bluff 2, Cercado de Mao. 



Turritella tornata Gupp}' 

 Plate 22, Figure 15 



Turritella tornata Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 



580, pi. 26, fig. 12, 1S66. 

 Turritella tornata Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 240. 1873. 

 Turritella tornata Dall, Trans. Wagner Inst., vol. 3, pt. 2, p. 312 ,1892; 



Id. pt. 6, p. 1585, 1903. 

 Turritella tornata Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila., 



p. 359, 1911. 



The beads on our specimens are not so large as on the type 

 from Cumana; but the description otherwise fits exactly. T. 

 tornata is of the same group as Conrad's T. altilira from Gatun 

 and Heilprin's T. perattenuata from the Florida Pliocene, but 

 both these species are very much larger with coarser, bolder 

 sculpture. 



Localities. — (Exp'd '16) Zones D and E, Rio Gurabo at 

 Los Quemados. 



Turritella submortoni, n. sp. 

 Plate 22, Figure 16 



Shell turreted, the whorls increasing rapidly, excavated above 

 the suture and sharply carinated at their anterior fourth by a 

 ridged spiral thread, posterior to this carina are five or six less 

 prominent spirals and anterior to it are two, making about eight 

 in all. Some or all of the spirals are microscopically beaded. 

 Length of incomplete shell 25, greatest width 9 mm. 



Some of the later Lignitic and early Claiborne specimens of 

 T. Mortoni resemble this species. One set collected by Professor 

 Harris in Newcastle, Virginia, are strikingly like in surface mark- 

 ings and general aspect. 



The Gatun analogue of the Dominican species is T. mimetes 

 Brown and Pilsbry. 



Localities. — (Exp'd '16) Zones D add E, Rio Gurabo at 

 Los Ouemados. 



