6i8 CRETACEOUS PALEONTOLOGY. 



and if both the species had not been given the same specific name, 

 both would have been referred to the genus TelUna in the present 

 report. 



Pormation and locality. — Woodbury clay, near Matawan 

 (103); Weno-nah sand, near Marlboro (130); Red Bank 

 Sand? Shrewsbury River (119). 



Geographic distribution. — New Jersey, Georgia, Texas. 



Genus Linearia Conrad. 



Linearia metastriata Conrad. 



Plate LXX., Pigs. 8-9. 



i860. Linearia metastriata Con., Jour. Acad. Nat. Sci. Phil., 



2d ser., vol. 4, p. 279, pi. 46, fig. 7. 

 1861. Linearia metastriata Gabb, Synop. Moll. Cret. Form., p, 



193 (137)- 

 1864. Linearia metastriata Meek, Check List Inv. Foss., N. A., 



Cret. and Jur., p. 14. 

 1870. Linearia Con., Am. Jour. Conch., vol. 6, pp. 73-74, pi- 2>r 



fig. II. 

 1886. Linearia metastriata Whitf., Pal. N. J., vol. i (Monog. 



U. S. G. S., vol. 9), p. 165, pi. 23, figs. 6-7. 

 1905. Linearia metastriata Johns., Proc. Acad. Nat. Sci. PhiL 



(1905), p. 16. 



Description. — The dimensions of a large individual are: 

 length, 25 mm. ; height, 16 mm. Shell subelliptical in outline, 

 depressed convex. Beaks small, appressed, but little elevated 

 above the hinge-line, situated nearly centrally. Hinge-line a 

 little arcuate; anterior and posterior cardinal margins meeting 

 at the beak in an angle of about 145"; anterior and posterior 

 margins both rounded, the anterior a little higher than the pos- 

 terior; basal margin broadly convex. Valves nearly regularly 

 convex, the surface sloping more abruptly to the cardinal margin. 

 Surface of the shell marked by fine concentric ribs increasing 

 regularly in size and separated by sharply depressed furrows 

 about equaling the ribs in width; also by radiating furrows 

 which cut through the concentric ridges, giving them more or 



