no Bulletin 29 274 



Localities. — (Exp'd'16) Rio Amina, between Hato Viejo and 

 Potrero; Bluff 3, Cercado de Mao. 



Genus Cassis L,amarck 

 Cassis sulcifera Sowerby 

 Plate iS, Figures 1, 2, 3 

 Cassis sulcifera Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 



47, pi. 10, fig. 1, 1849. 

 Cassis sulcifera Guppy , Quart. Jour., Geol. Soc, vol. 22, p. 286, 1866. 

 Cassis sulcifera Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 222, 1873. 

 Cassis sulcifera Guppy, Geol. Mag. London, p. 439, 1874; Quart. Jour. 



Geol. Soc. London, vol. 32, p. 525, 1876. 

 Cassis sulcifera Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 

 1903; Proc U. S. Nat. Mus., vol. 51, No. 2162, p. 508, pi. 86, fig. 4, 

 1916. 



This fine shell exhibits such diverse aspects in youth and in 

 old age as to appear, without a connecting series, two different 

 species. The descendant is C. tuberosa Linne which we col- 

 lected on the Monte Cristi beach. 



C. sulcifera has been found at Bowden and in the Flint River 

 Oligocene, Georgia. It is abundant in Santo Domingo. 



Localities. — (Exp'd'16) Bluffs 1, 2, 3, Cercado de Mao; 

 Zones C, B, E, D, F, Rio Gurabo, at Los Quemados; Zones H 

 and I, Rio Cana at Caimito. 



Subgenus Phalium Link 



Phalium moniliferum Guppy 

 Plate 18, Figures 4, 5; Plate 19, Figure 1 

 Cassis monilifera Guppy, Quart. Jour. Geol. Soc. London, vol. 22, 



p. 287, pi. 17, fig. 8, 1866. 

 Cassidea granulosa Gabb, Trans. Amer. Phil. Soc, vol. 15. p. 222, 1873. 



Not C. granulosa Bruguiere. Exclude synonymy. 

 Cassis reclusa Guppy, Geol. Mag. London, pp. 434, 439, 1874; Quart. 



Jour. Geol. Soc, London, vol. 32, p. 525, 1876. 

 Cassis monilifera Guppy, Quart. Jour. Geol. Soc, vol. 32, p. 525, 1876. 

 Cassis reclusa Dall, Trans. Wagner, Inst. Sci., vol. 3, pt. 6. p. 1584, 



1903. 

 There is no constant point of difference between C. monili- 

 fera and C. reclusa and intermediate forms connect the two, but 



