Maryland Geological Survey 299 



wavy and crossed by slightly finer eoncentric striae. The number of 

 volutions, large ventricose body-whorl and cancellated surface are dis- 

 tinctive characters of this species. Small, compressed specimens from 

 Evitts Creek below Wolfe Mill and road oast of Pine Hill about four 

 miles north of Oldtown are identified by Dr. J. j\I. Clarke as " not very 

 far from Platyostoma Uneatum." 



Length, 23 mm.; width, 27 mm. 



Occurrence. — Romney Formation, Hamilton Member. Ernstville; 

 Evitts Creek below Wolfe Mill (?) ; east of Pine Hill 4 miles north of 

 Oldtown ( ?) ; National Eoad J mile west of Tonoloway Eidge; southwest 

 of ]\IcCoys Ferry ; west of Lock No. 5G at Great Cacapon. 



Collections. — ^Maryland Geological Survey ; American Museum of Nat- 

 ural History. 



Genus PLATYOSTOMA Conrad 



Platyostoma cf. EUOMrHALOiDES Conrad 

 Plate XXXVII, Figs. 13-15 



Platyostoma euomphaloides Hall, 1879, Pal. N. Y.. vol. v, pt. ii, p. 25, pi. x, 



figs. 27-29. 

 Platyostoma cf. euomphaloides Kindle, 1912, Bull. U. S. Geol. Surv., No. 508, 



p. 97. 



Description. — " Shell depressed subhemispheric ; spire moderately ele- 

 vated; volutions three or four, gradually enlarging from the apex — the 

 last one expanded, not ventricose, with its exterior or periphery flat or 

 slightly convex, and flattened or gently concave in the middle above; 

 suture-line close. Aperture expanded, broadly subovoid; the inner lip has 

 thickened callous, which projects in a prominent rim along the posterior 

 border of the aperture. Surface marked by fine concentric striae, which 

 are crowded in fascicles." Hall, 1879. A crushed specimen bearing 

 considerable resemblance to this species occurs in the collection. 



Occurrence. — Eomney Formation, Onondaga Member. Williams 

 Eoad, 3V2 niiles southeast of Cumberland. 



Collection. — U. S. National Museum. 



[E. M. Kindle.] 



