CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 87 



Geological horizon. — Midway Eocene. Equivalent to the Midway of Alabama 

 and that of the Rio Maria Farinha beds, State of Pernambuco, Brazil. 



Named in honor of Mr. F. R. Bartlett, of Easton, Maryland, who aided Mr. 

 Veatch in collecting fossils from wave-swept Soldado. 



Cypraea vaughani new species. Plate XI, Figures 14, 15. 



Description. — Shell small, pyriform, tapering to a pointed base, inflated; sur- 

 face smooth except for faint lines of growth, which are most apparent on the 

 earlier whorls; spire distinct, acute, showing two small volutions, with a clearly 

 defined suture; aperture rather wide, but so filled with the indurated matrix that 

 all plications are concealed; outer lip much thickened, inner lip with a rather 

 fine callus. 



Height of shell 24, greatest width 17, thickness 14 mm. 



Remarks. — This peculiar Cyprcea is wholly unlike anything described from 

 the lower Eocene horizons. 



Locality. — Bed No. 2, Soldado Rock, Gulf of Paria. 



Geological horizon. — Midway Eocene. 



Named in honor of Mr. T. W. Vaughan, Washington, D. C, of the United 

 States Geological Survey. 



Genus ROSTELLARIA Lamarck, 1799. 

 Subgenus Calyptraphorus Conrad, 1857. 

 Calyptraphorus velatus Conrad var. chelonitis White. 



Calyptraphorus f chelonitis White, Arch do Museu Nac. do Rio de Janeiro, vol. VII, pp. 174-175, 

 pi. XI, figs. 17, 18, 19, 1887. 



Dr. White in 1887 described a Calyptraphorus from Rio Maria Farinha beds, 

 Province of Pernambuco, Brazil, as Calyptraphorus t chelonitis. His description 

 was as follows: " Shell small, subfusiform; the side upon which the aperture 

 opens at maturity is flattened by a large accumulation of callus, by which all 

 trace of the division of the spire into volutions is obliterated upon that side and 

 almost wholly upon the opposite side also. Upon the latter side the accumulation 

 is more irregular, apparently leaving only one spot at the middle, upon which no 

 callus was deposited when the shell reached maturity. The aperture is com- 

 paratively small, oblong, ending anteriorly in a minute channel which is excavated 

 out of a long slender beak, which is straight and in line with the axis of the shell; 

 outer lip a little thickened and reflexed, truncated at both the posterior and 

 anterior ends; the outer margin gently convex and bearing at its anterior end a 

 small obtuse projection." 



In all respects except the very last, namely, the obtuse projection of the 

 labrum — Dr. White's description answers to the Soldado forms. This character, 

 however, is important, and brings the. Brazilian shell closer to the type of velatus 

 than those from Soldado. But as it is constantly smaller, and differs in some 

 other respects from velatus, the writer would suggest that Dr. White's specific 

 name chelonitis should be used as a varietal name to distinguish the Brazilian 

 form of the species velatus. 



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