Maryland Geological Survey 125 



umbo and depressod below, the h'lijith a little greater than the greatest 

 width, rapidly expanding for about two-thirds the length of the shell, 

 below wliich it is abruptly rounded ; shell tliiek ; surface marked by strong 

 concentric lamellose striae, and. in the exfoliated surface. 1)y fine radiating 

 striae." Hall, 1867. 



Several specimens were found in the bluish shales of Evitts Creek 

 below Wolfe Mill which agree fairly well with the description of the 

 above species. Their outline is similar, except that the anterior part of 

 the shell is not as broad : but the concentric lamellose striae and fine radiat- 

 ing ones are well shown. They were compared with the specimen figured 

 as L. ( ?) paliformis Hall (Pal. X. Y., vol. viii, pt. i, pi. ii, fig. 7) with 

 which they closely agree in form, and the strong concentric lamellose 

 striae conspicuous on the type specimens are well shown on the ]\Iaryland 

 ones. 



Length, 7^-12 mm.; width, 4^-11 mm. 



Occurrence. — Komney Formatiox, Hamiltox Member. Williams 

 Eoad 3| miles southeast of Cumberland; east bank Evitts Creek below 

 Wolfe Mill. 



Collections. — Mar}'land Geological Survey; New York State Museum; 

 American ^Museum of Xatural History. 



Family LINGULIDAE 



Genus LINGULA Bruguiere 

 LiXUULA DELLV Hall (?) 



Plate VI IT. Fig. 5 



Lingula delia Hall, 1863, Sixteenth Rep. N. Y. State Cab. Nat. Hist., p. 22. 



Lingula delia Hall, 1867, Pal. N. Y.. vol. iv, p. 12, pi. ii, fig. 9. 



Lingula delia Hall and Clarke, 1892, Pal. N. Y., vol. viii, pt. i, p. 15, pi. i, 



fig. 29. 

 Lingula delia Clarke, 1903, N. Y. State Mus. Bull. 65, p. 247. 



Description. — "Shell elliptical, twice as long as wide; sides gently 

 curving; front very regularly rounded; cardinal slopes abrupt, nearly 



