2,4-7 Dominican Fossils — Maury 83 



Latirus fusiformis Gabb 

 Plate 13, Figure 4 

 Latirus fusiformis Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 



217, 1873- 

 We have a number of specimens of a Latirus agreeing with 

 Gabb's description of this unfigured species. 



Localities. — (Exp'd '16) Zone D, Rio Gurabo at Los 

 Quemados; Bluff 2, Cercado de Mao. 



Latirus- exilis Gabb 

 Plate 14, Figure 4 

 Latirus exilis Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 217, 1S73. 



Our shell corresponds exactly with Gabb's description of 

 this striking species, marked by the small aperture and canal 

 twisting to the right upon the pillar. 



Locality. — (Exp'd '16.) Zone B, Rio Gurabo at L,os 

 Quemados. 



Genus Xancus Bolten 



Xancus validus Sowerby 

 Plate 13, Figure 5 

 Turbinellus validus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, 



p. 50, 1849. 

 Turbinella valida Gabb, Trans. Amer. Phil. Soc. 15, p. 218, 1873. 

 Turbinellus validus Guppy, Geol. Mag. London, p. 438, 1874; Quart. 



Jour. Geol. Soc. London, vol. 32, p. 523, 1876. 

 Turbinella scolymus Tryon (in part) Manual Conch, vol. 4. p. 70, 



1882. Not the recent shell. 

 Turbinella validus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 



99, 1890. 

 Turbinella scolymus Dall (in part) Trans. Wagner, Inst. Sci., vol. 3, 



pt. 1, p. 97, 1890. 

 The smoother species X. Wilsoni, from the Vicksburg is the 

 ancestor of X. validus, while the recent X. scolymus is its 

 descendant. We have fine shells of validus that Gabb collected 

 in Santo Domingo. Guppy reported it from the Caroni Series, 

 Trinidad. 



Xancus procevoideus, n. sp. 

 Plate 14, Figure 18 

 Turbinella ovoidea Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 218 



