35^ Dominican Fossils — Maury 187 



Not of Sowerby. 

 Pecten (Nodipecten) nodosus Dall, Trans. Wagner Inst. Sci., vol. 3, 



pt. 4, p. 717, 1898. 



We collected several imperfect shells resembling recent spec- 

 imens of P. nodosus from St. Thomas. The fossils show but few 

 of the characteristic hollow nodes; but their presence is also vari- 

 able in the recent shells. 



Locality. — (Exp'd '16) Zone H, Rio Cana at Caimito; 

 Limestone bluff, Rio Gurabo at Los Quemados. 



Pecten excentricus Gabb 



Plate 34, Figure 8 

 Pecten eccentricus Gabb, Trans, Amer. Fhil. Soc, vol. 15, p. 256, 



i873- 

 Pecten (Plagiocte?iium) excentricus Dall, Trans. Wagner Inst. Sci., 

 vol. 3, pt. 4, p. 717, 1898. 



Shell with a general resemblance to P. irradians Lamarck, 

 but with broader, flatter ribs numbering twenty to twenty-two, 

 sometimes feebly grooved medially; interspaces concave; ribs and 

 interspaces with looped growth lines; ears small. Length of our 

 largest shell 38, altitude 35, semidiameter 11 mm. Gabb gives 

 2 5 to 38 for the length of the types. 



Our shells appear to be this unfigured species as they accord 

 with Gabb's description. 



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



Pecten (Plagioctenium) Gabbi Dall 



Pecten paranensis Gabb, J our. Acad. Nat. Sci. Phila., sec. ser., vol. 



8, p. 347, pi. 45, fig. 24, 1 881. Not of d'Orbigny 1849. 

 Pecten {Plagioctenium) Gabbi Dall, Trans. Wagner Inst. Sci., vol.3, 



pt. 4, p. 717, pi. 29, fig. 3, 1898. 



Shell broad, compressed, oblique, nearly %quivalve, with 

 nineteen scabrous ribs and narrower interspaces each with one 

 imbricated riblet. Altitude 48, length 52, diameter 13 mm. De- 

 scribed by Dall from the Oligocene of Antigua and Santo Do- 

 mingo. 



