MARYLAND GEOLOGICAL SURVEY 185 



Occurrence. — Talbot Formation. Wailes Bluff near Cornfield Har- 

 bor, St. Mary's County. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 and U. S. National Museum. 



Suborder STREPTODONTA. 



Superfamily PTENOGLOSSA. 



Family SCALIDAE. 



Genus SCALA Humphrey. 

 SCALA LINEATA (Say) 



Plate L, Figs. 1, 2. 



Scalaria lineata Say, 1822, Jour. Acad. Nat. Sci. Phila., vol. ii., 1st ser., p. 



242. 

 Scalaria lineata Holmes, 1859, Post-PL Fos. S. C, p. 90, pi. xiv, fig. 3. 

 Scala lineata Dall, 1889, Bui. U. S. Nat. Mus., No. 37, p. 124. 

 Scala lineata Dall, 1890, Trans. Wagner Free Inst. Sci., vol. iii, pt 1, p. 158. 



Description. — " Shell brownish, elongated, with about seven volutions ; 

 costa robust, obtuse, little elevated, and from seventeen to nineteen on the 

 body whirl; body whirl with generally a blackish, more or less dilated 

 line, which is nearly concealed on the volutions of the spire by the suture ; 

 margin of the mouth robust, white, more dilated at the columella base." 

 Say, 1822. 



This beautiful form is rare in the Maryland Pleistocene and does not 

 attain the size of the living specimens. It appears in the Pliocene of 

 North Carolina and Florida and is recognized from the Pleistocene of 

 Maryland and South Carolina. In the Eecent it ranges from Cape Cod 

 to Florida and perhaps to Texas. 



Length, 11 mm.; width, 4.5 mm. 



Occurrence. — Talbot Formation. Wailes Bluff near Cornfield Har- 

 bor, St. Mary's County. 



Collections. — Maryland Geological Survey, Johns Hopkins University, 

 and IJ. S. National Museum. 



