MOLLUSCA. 615 



Remarks. The type specimen is the only member of this 

 species which has been observed. It is an imperfect internal cast, 

 the right valve being well preserved but with the left valve much 

 injured. 



Formation and locality. Manasquan marl, near New Egypt 

 (Whitfield). 



Geographic distribution. New Jersey. 



Super-family TELLINACEA. 

 Family TBLLINIDAE. 



Genus TEWJNA Linneus. 



Tellina georgiana Gabb. 



Plate LXX., Figs. 1-2. 



1876. Tellina (Telinella) Georgiana Gabb, Proc. Acad. Nat. 



Sci. Phil., (1876), p. 307. 

 1905. Tellina georgiana Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 16. 



Description. The dimensions of two specimens are: length, 

 32 mm. and 46 mm.; height, 16 mm. and 23 mm. Shell very 

 broadly subtriangular in outline, the beaks nearly central, and 

 pointing a little backward, the greatest anterior extension at 

 about the mid-height of the shell, the greatest posterior extension 

 considerably below the middle. The anterior and posterior car- 

 dinal margins meeting at the beak in an angle of about 140 

 to 150, curving gently downwar'd in front and behind; anterior 

 margin rather sharply rounded; ventral margin very long and 

 gently convex; postero-basal extremity sharply rounded or sub- 

 angular; posterior margin nearly vertically subtruncate below, 

 curving forward above and passing into the cardinal margin. 

 Valves depressed convex, with a subangular umbonal ridge ex- 

 tending from the beak to the postero-basal extremity, the surface 

 sloping with a very gentle convex curve to the anterior, posterior 

 and ventral margins ; curving much more abruptly to the car- 

 dinal margins, but just before reaching the margin the surface 



