243 Dominican Fossils — Maury 79 



Henekeni to F. eucosmium Dall, living in the Antilles. Doubt- 

 less our fossil is the ancestor of this more slender, recent shell. 



Localities. — (Exp'd '16) Bluffs 1 and 3, Cercado de Mao; 

 Zones A and B, Rio Gurabo at Los Quemados; Zone H, Rio 

 Cana at Caimito. 



Fusus Heneke?ii variety haitensis Sowerby 

 Plate 12, Figure 2 

 Fusus Haitensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 



49. i§49- 

 Fusus Haitensis (?) Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 204, 



- 1873. 

 Fusus haitensis Guppy, Geol. Mag. London, p. 439, 1874. 

 Fusus Henekeni variety haitenses Guppy, Quart. Jour. Geol. Soc. Lon- 

 don, vol. 32, p. 524, pi. 28, fig. 2, 1876. 

 Fusus haitensis Grabau, Smithsonian Misc. Coll., vol. 44, no. 1417, p. 

 20, 1904. 



Shell resembling F. Henekeni and grading into that species, 

 but differing as follows: — (1) The whorls are angulated, cari- 

 nated, and flattened posteriorly; (2) the ribs do not continue to 

 the suture; (3) the spirals are more distant, not crowded; (4) 

 the ribs often become obsolete on the later whorls. This accel- 

 erated gerontism appears to be an individual characteristic. 



Localities. — (Exp'd '16) Zones A, B, D, Rio Gurabo at 

 Los Quemados; Bluff 3, Cercado de Mao; Zone I, Rio Cana at 

 Caimito. 



Fusus Henekeni variety Veatchi, n. var. 

 Plate 12, Figure 3 



Shell resembling F. Henekeni, but differing in the following 

 respects: — (1) The structure of the shell is much lighter so that 

 a specimen of equal size is much less ponderous and thinner; (2) 

 the spirals are less crowded and less sharply ridged; (3) the ear- 

 lier whorls have about eight rounded, longitudinal ribs to a volu- 

 tion, but they begin to fade out on the third whorl from the 

 last; (4) the last two whorls are without ribs, are ventricose, not 



Printed March 19, 1917 



