175 Dominican Fossils — Maury ii 



MOLLUSCA 



CLASS GASTROPODA 



ORDER OPISTHOBRANCHIATA 

 Suborder Pteropoda 



Genus Cavouna Abildgaard 

 Cavolina, sp. indet. 



Shell minute, resembling in some respects the recent C. gib- 

 bosa Rang, but not identical with that species. The ventral sur- 

 face is extremely globular, evenly rounded, not crested as in C. 

 gibbosa. The dorsal surface is flat, projects beyond the opening, 

 curves upwards slightly and is strongly tri-sulcate. The single 

 shell found is too imperfect for detailed description. Attention 

 is merely called to the presence of the genus. A species near 

 C. gibbosa is also reported by Dr. Dall from the Bowden beds, Ja- 

 maica. 



Locality. — (Exp'd '16) Bluff 3, Cercado de Mao. 



Suborder Tectibranchiata 



Genus Action Montfort 



ActcBon riomaensis , n. sp. 

 Plate 3, Figure 1 



Actceon cubensis Gabb (in part), Trans. Amer. Phil. Soc, vol. 15, p. 

 245, 1873. Not the recent shell. 



