368 PROCEEDINGS OF THE ACADEMY OF [April, 



•Cardium (Fragum) gatunense Dall. 



Trans. Wagner Free Inst., III, p. 1100. 

 Black shales of Gatun, collected by R. T. Hill. We have not seen 

 this species. 



*Cardium (?) newberryanum Oabb. 



C. (Protocardia) newberryanum Gabb, Journ. A. N. S. Phila., VIII, p. 344, 

 PI. 44, fig. 17. 



Gatun (Newberry). 



TELLINID^]. 

 ♦Tellina dariena <'onrad. 



T. dariena Conr., Pacific R. R. Rep., V, p. 32S, PI. 6, fig. 55. 



*Tellina gatunensis Toula. 



T. gatunensis Toula, Jahrb., p. 729, text fig. 10. 



*Tellina rowlandi Toula. 



T. rowlandi Toula, Jahrb., p. 728, PL 28, fig. 11. 



*Tellina lepidota Dall. 



Tellina (Phyllodina) lepidota Dall, Trans. Wagner Free Inst., Ill, p. 1022, 

 PI. 46, fig. 18. 



Oligocene sandstone at Gatun (Dall). 



*Semele sayi Toula. 



S. sayi Toula, Jahrb., p. 730, PL 28, fig. 17. 

 Tellina sp. undet. 



Casts of a species resembling Tellina laevigata in size and shape. It 

 is distinct from any species recorded by Toula,, and apparently not 

 found in the Bowden or Santo Domingo beds. 



Tellina sp- undet. 



Casts of a species possibly identical with T. laceridens Hanley, 

 agreeing closely with that in shape. It is somewhat larger; length 61, 

 alt. 37 mm. 



We consider fig. 168 of the Thesaurus monograph to be the typical 

 form of T. laceridens. 



VENERIDiE. 

 Chione tegulum n.'sp. PI. XXVIII, fig. 8. 



Shell plump, the altitude almost equal to the length, with prominent 

 prosogyrate beaks near the anterior third. Sculpture of rounded,. 

 tilelike radial ribs (their summits 1 mm. apart near the basal margin f 

 in the median part of a shell 19 mm. in alt.) ; these are interrupted by 

 narrow, concentric, machiolated ridges, curved downwards in the 

 intervals, upward where they cross the radial ribs. There are 26 of 

 the concentric ridges in a shell 19 mm. in altitude. The wide, cordate 



