23 



American Tertiary Shells 



23 



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

 dad." 



Collectedby A. C. Veatch in 191 2, then of the General As- 

 phalt Company of Philadelphia. 



Genus ERATO Risso 



Erato vaughani (Maury) PI. 3 Figs. 8, 9. 



Cyprcza vaughani Maury, Jour. Acad. Nat. Sci, Phila., 2nd ser. vol. 

 XV, 1912, p. 87, pi. XI, fig. 14, 15. 



Original description. — "Shell small ; pyriform, tapering to a pointed 

 base ; inflated ; surface 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 particular Cyprcca is wholly unlike anything described 

 jrom the lower Eocene horizons." 



We have been able to obtain, since Miss Maury described 

 this species, three additional specimens and remove the rock ma- 

 trix so as to reveal the character of the aperture, the smooth col- 

 umella and crenulated outer lip. 



Size and shape of shell as indicated by the figures ; whorls 

 five ; a deep posterior sulcus, the margin of the outer lip height- 

 ened or extending over the whorls of the spire as in many young 

 CyprcecB ; the very characteristic feature of this species is the 

 elongate, Pyrula-like base or canal. 



Specime?is figured. — Pal. Museum, Cornell Univ. 



Geological Horzion, — Midway Eocene. 



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

 dad." 



PLEUROPHOPSIS, new genus 



Description . — The form known only from casts ; large, elong- 

 ate, inequilateral, beaks situated about one-fourth the length of 

 the shell from the anterior end ; surface sculpture consists of 

 heavy, concentric lines of growth ; two cardinal teeth in the left 

 valve, the posterior cardinal very large, the anterior slender ; 



