2$t Dominican Fossils — Maury 67 



(B.) SUPER-FAMILY RHACHIGLOSSA 



Genus Oliva Bruguiere 



Oliva cylindrica Sowerby 



Plate 10, Figures 14, 14a 



Oliva cylindrica Sowerby, Quart. Jour. Geol. Soc, vol. 6, p. 45, 1849. 

 Oliva reticularis Guppy, Quart. Jour. Geol. Soc, vol. 22, p. 288, 1866. 



Not reticularis L/amarck. 

 Oliva cylindrica Gabb, Trans. Amer. Phil. Soc, vol. 15, p. 215, 1873. 

 Oliva cylindrica Guppy, Quart. Jour. Geol. Joe, vol. 32, p. 526, 1876. 

 Oliva cylindrica Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1583, 1903. 

 Oliva cylindrica Cossmann, Journ. de Conchyliologie, vol. 61, p. 57, 



pi. 5, figs. 2, 3, 1913. 



A comparison of specimens shows our fossils to be very close 

 to the recent O. reticularis and O. litterata, but rather heavier, 

 larger and broader. 



Guppy reported O. cylindrica from the Isthmus, Cumana, 

 Barbuda, Trinidad (Caroni Series); and Dall and Cossmann 

 from Bowden. The type was collected by Heneken in Santo 

 Domingo. 



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

 Rio Gurabo at Dos Quemados; Zones H and I, Rio Cana at 

 Caimito. 



Oliva Cristobalcoloni, n. sp. 

 Plate 10, Figure 15 



Shell very slender, spire high, suture channeled; whorls 

 eight, the first three nuclear, the initial extremely small, the second 

 slightly larger, the third increasing suddenly; subsequent whorls 

 sloping evenly to the tapering body; inner lip with many short, 

 transverse, posterior plications and five or six longer anterior 

 folds. Dength 32, width 11.5 mm. 



This species is distinguished from our other Olives by its 

 very slender form, high spire, and extremely sloping shoulder. 

 It is much narrower and more tapering than young shells of O. 

 cylindrica, reticularis , or litterata. 



