136 Bulletin 29 300 



Localities — -(Exp'd '16) Bluffs 2, 3, (Very abundant) Cer- 

 cado de Mao; Rio Cana, Gravels; Rio Can a, Sandy clays; Zones 

 H and I, Rio Cano at Caimito; Zones E and G, Rio Gurabo at 

 Los Quemados. 



Genus Polinices Montfort 



Polinices subclausa Sowerby 

 Plate 23, Figure 14 

 Natica subclausa Sowerby, Quart. Jour, Geol. Soc. London, vol. 6, p. 



51, 1849. 

 Natica subclausa Guppy, Quart. Jour. Geol. Soc, vol. 22, p. 290, pi. 



18, fig. 8, 1866. 

 Mammilla mamillaris Gabb (in part), Trans. Amer. Phil. Soc, vol. 



15, p. 223, 1873. Not P. mammillaris Lamarck. 

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



Jour. Geol. Soc, vol. 32, p. 519, 1876. 

 Polynices subclausa Dall, Trans. Wagner Inst. Sci., vol 3, pt. 6, p. 1585, 



1903. 

 Polinices subclausa Brown and Pilsbry, Proc Acad. Nat. Sci. Phila., p 



360, 191 1. 



We collected shells of P. mammillaris Lamarck on the Monte 

 Cristi beach. They are much larger than the fossils and light 

 orange brown, not striped. Some of the fossils retain their color 

 pattern of gray stripes on a white background. These differences 

 indicate that Sowerby 's species is distinct from the recent ana- 

 logue. 



P. suclausa has been found at Bowden and Gatun and is 

 abundant in Santo Domingo. 



Localities. — (Exp'd '16) Zones H and I, Rio Cana at Cai- 

 mito; Gravels and sandy clays of Rio Cana; Bluffs 2 and 3, Cer- 

 cado de Mao; Zones D and E, Rio Gurabo at Los Ouemados. 



Polinices Stanislas-Mezinieri 



Plate 23, Figures 15, 16 



Shell ovate, with five and a half rounded whorls; spire conic; 



entire surface smooth except for growth-lines; body whorl very 



slightly concave in front of the suture, elsewhere evenly rounded, 



aperture semi-circular; inner lip with a thick posterior callus ex- 



