STRATIGRAPHIC PALEONTOLOGY. 147 



The following additional species of Mollusca in the collections of the 

 U. S. National Museum were collected at Potrero, on Rio Amina, by Bland 

 and Rowell. Some of the the species were described by Dall in 1895. l 



Acteon riomaensis Maury. 



Ringicula n. sp. cf. R. tridentata Guppy. 



Retusa sulcata Gabb not d'Orbigny. 



Cycliehnella trictumtritonis (Maury) n. subsp. 



Terebra gabbi Dall. 



Terebra (Strioterebra) cirra Dall. 



Terebra (new subgenus Gardner MS.) sulcifer Sowerby subsp. haitensis Dall. 



Terebra (Fusoterebra ?) emitra Dall. 



''Mangilia" dominicensis (Gabb). 



"Cythara" polygona (Gabb). 



Cancellaria rowelli Dall. 



Marginella amina Dall. 



Marginella dominguensis Dall. 



Marginella latissima Dall. 



Phos guppyi Gabb. 



Phos semicostatus Gabb. (Probably not from same horizon.) 



Phos costatus Gabb. (Probably not from same horizon.) 



Phos fasciolatus Dall. 



Cymia n. sp. cf. C. henekeni Maury. 



Strombina cyphonotus Pilsbry and Johnson. 



Strombinella acuformis Dall. 



Murex (Phyllonotus) compactus Gabb. 



Trophon dominicensis Gabb. 



Cadulus phenax Pilsbry and Sharp. 



Deeper- Water Facies of Gurabo Formation. 

 Station. 

 8702 (D. C. 32). Province of Santiago, bluff on south bank of Rio Yaque del Norte, 

 !.6 kilometers west of Santiago, D. D. Condit, collector. April 20, 1919. 



Faunal list. 

 Corals: 



Placocyathus variabilis Duncan. 

 Placocyathus barretti Duncan, var. 

 Placocyathus n. sp. a. 

 Placocyathus n. sp. d. 

 Deltocyathus italicus (Mich't). 

 Stylophora granulata Duncan ? var. 

 Asterosmilia sp. 

 Teleiophyllia n. sp. a. 

 Syzygophyllia dentata (Duncan). 

 Agaricia dominicensis Vaughan ? 

 Agaricia n. sp. f. 

 Porites sp. 



'Dall, W. H., U. S. Nat. Mus. Proc, vol. 18, pp. 21-46, 1895. 



