299 Dominican Fossils — Maury 135 



living in the Antilles and south to Pernambuco. 



Localities. — (Exp'd '16) Bluff 1, Cercado de Mao; Zone 

 I, Rio Cana; Sandy clays, Rio Cana. 



Natica Yotingi n. sp. 

 Plate 23, Figures n, 12 



Shell subglobular, with five rounded whorls; suture well-de- 

 fined; surface smooth except for growth-lines; aperture semi- 

 lunar; posterior callus of inner lip thickest at the angle of the 

 aperture; umbilical callus coiled on the umbilical wall near the 

 base, leaving the upper part of the umbilicus entirely open. Var- 

 ious specimens give the following heights and widths: 23X22, 

 17 X 16, 22 X21 mm. 



This species resembles the Jacksonian Eocene, N. permunda 

 Conrad, and to a less degree, the Chipolan Oligocene N. altical- 

 losa Dall. But the former has the callus coiled on the middle of 

 the wall, and the latter at the upper end, while our shell has it 

 coiled near the base. Doubtless N. per?mt?ida is the precursor 

 of the Dominican shell. 



This species is named in honor of Professor Young, South 

 African College, Cape Town. 



Localities. — (Exp'd '16) Zones A, B, E, F, G, Rio Gura- 

 bo at Los Ouemados; Bluffs 1, 2, Cercado de Rio Mao; Zone I, 

 Rio Cana at Caimito. 



Natica {Stigmaulax) sulcata Born 

 Plate 23, Figure 13 

 Natica sulcata Born, Mus. Cses. Vindobonensis, pi. 17, figs. 5, 6. 

 Natica sulcata Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 290, 



pi. 18, figs. 14, 15, 1866. 

 Natica sulcata Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 233, 1873. 

 Natica, sulcata Guppy, Geol. Mag. London, p. 437, 1874; Quart. Jour. 



Geol. Soc, vol, 32, p. 518, 1876. 

 Natica [Stigmaulax) sulcata Dall, Trans. Wagner Inst. Sci., vol. 3, 



pt. 2, p. 366, 1892; Id. pt. 6, p. 1585, 1903. 

 This handsome grooved species attained a large size and is 

 abundant in the blue clays. It has been found at Bowden and 

 Cumana and is still living in the Antilles. 



