2i8 Bulletin 29 38s 



Cytherea ( Ventricola) Blandiana Dall. Trans. Wagner Inst. Sci., vol. 

 3, pt. 6, pp. 1277, 1587, 1900. 



Larger and finer than specimens from Jamaica whiph is the 

 type locality, but apparently the same species. Readily recog- 

 nized by the elegant sculpture of equidistant, concentric lamellae 

 between each of which are groups of concentric threads. Guppy's 

 type had seven or eight threads in every group, ours rarely show 

 as many and only over the umbones, usually there are about four 

 to a group. Our largest shell measures in length 41, altitude 36, 

 diameter 25 mm. 



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

 A, B, F, Rio Gurabo at Los Quemados ; Guayubin to Mao road, 

 Rio Cana. 



Genus Chi one Megerle von Miihlfeldt 



Chione Woodwardi Guppy 

 Plate 37, Figure 6 



Venus Woodivardi Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 

 292, pi. 18, fig. 1, 1866; Id., vol. 32, p. 530, 1876. 



First described from Jamaica but also common in Santo Do- 

 mingo, our specimens according in every respect with Guppy's 

 description. The recent Antillean analogue of this beautifully 

 sculptured shell is C. cancellata Linne. 



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

 Zone G, Rio Gurabo at Los Quemados ; Zone I, Rio Cana at 

 Caimito. 



Chione cf. Walli Guppy 

 Plate 37, Figure 7 ■ 

 Venus Walli Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 581, 



pi. 26, fig. 16, 1866. 

 Chione Walli Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, pp. 1291, 

 1587, 1903. 



Among our Chiones are several which differ from C. Wood- 

 wardi in their somewhat larger size, and in the distinct doubling 

 of the ribs upon the disc. The latter feature is characteristic of 

 C. Walli, described by Guppy from the Manzanilla beds of 

 Trinidad and also found at Bowden but not as yet reported from 



