TRANSACTIONS OF WAGNER 

 10^6 



TERTIARY FAUNA OF FLORIDA 



Macoma ( Psammotreta ) aurora Hanley. 

 Tellina aurora Hanley, P. Z. S., 1844, p. 147; Thes. Conch., p. 301, No. 153, pi. Iviii., 

 fig. 76, 1846. 



Pleistocene of San Diego, California; Stearns (abundant); recent, from 

 the Panamic region to the Gulf of California. 



This form is in a general way similar to M. brevifrons Say, and probably 

 for that reason was identified with Tellina oblonga Gmelin by Deshayes. As 

 Chemnitz, upon whose figure Gmelin's species was based, distinctly says his 

 species is not European, but from Guinea and the West Indies, it cannot be 

 assumed to be the Panama shell when one equally near Chemnitz's figure is 

 found in the West Indies, namely, M. brevifrons. 



Macoma (Cymatoica) Vendryesi n. sp. 



Plate 46, Figure 3. 



Oligocene of the Bowden marls, Jamaica ; Henderson and Simpson. 



Shell minute, thin, flexuous, rostrate, inecjuivalve, inequilateral, gaping 

 behind, moderately inflated; anterior end full, rounded, shorter; posterior 

 end longer, rectilinear above, sinuous below, produced into an obliquely trun- 

 cate rostrum ; beaks low, pustular, left valve slightly less convex than the 

 light and a little longer; surface concentrically irregularly undulated except 

 on the posterior dorsal area, which is transversely striated ; pallial sinus small, 

 short, partly confluent below with the pallial line. Lon. 7, alt. 4, diam. 2 mm. 



This species is considerably smaller than the recent M. orientalis Dall, the 

 concentric wave-like sculpture is finer and less broken, and the shell is rela- 

 tively more inflated. The teeth are quite feeble and minute. 



The presence of this type so long ago as the Oligocene, with its charac- 

 teristics fully developed, lends plausibility to the assumption upon which its 

 separation from the typical Macomas was based. The genus Strigilla, the 

 section Phyllodina, etc., are analogous cases. 



The present species is named in honor of Henry Vendryes, Esquire, of 

 Kingston, Jamaica, who has given many years to the investigation of the 

 Tertiary and recent Mollusks of Jamaica. 



Superfamily VENERACEA. 



Family PETRICOLID/E. 

 Genus PETRICOLA Lamarck. 

 Petricola Lamarck, Syst. An. s. Vert., p. 121, 1801. 



Rupellaria Fleuriau de Bellevue, Mem. s. les vers lithoph., p. 3, 1802. Type Venus litho- 

 pliaga Retzius. 



