Maryland Geological Survey 209 



This species is characterized hy its plano-convex to nearly flat shape, 

 ovate to orbicular form, eight to ten rather broad and rounded plications 

 crossed by sharp imbricating lines, the central plication on the dorsal 

 valve considerably depressed and bordered on each side by the strongest 

 one of the valve, while on the ventral valve two plications are somewhat 

 depressed in a broader and more shallow sinus the boundaries of which are 

 not indicated by two as prominent plications as on the dorsal valve. 



Kindle repeats that this is probably the most abundant and widely 

 distributed species in the Onondaga fauna, occurring in most of the 

 collections from New York to southwestern Virginia. 



Length, 10-14 mm.; width, 14-17 mm. 



Occurrence. — Komney Formation, Onondaga Member. B. & 0. 

 E. R. cut at 21st Bridge; Williams Road, 3i miles southeast of Cumber- 

 land. Hamilton Member. East bank Evitts Creek below Wolfe Mill. 



Collections. — Mar}'land Geological >Survey; American Museum of Nat- 

 ural History; U. S. National Museum. 



AnOPLOTHECA CAMILLA (Hall) 



Plate XX, Fig. 24 



Coelospira concava Hall, 1867 (non Hall 1863), Pal. New York, vol. 4, 1867, 



p. 329. 

 Coelospira Camilla Hall, 1867, ibidem, pi. 52, figs. 13-19. 

 Anoplotheca Camilla Kindle, 1912, Bull. U. S. Geol. Surv., No. 508, p. 85. 



This rather diminutive brachiopod is represented by only a few posi- 

 tively determined specimens in the collection. Although comparatively 

 rare it has been found both in the non-calcareous shale and the lime- 

 stone in three states and is probably coextensive with the Onondaga 

 fauna in its distribution. 



Occurrence. — Romney Formation, Onondaga Member. Williams 

 Road 3I/2 miles southeast of Cumberland. 



Collection. — U. S. National Museum. 



[E. M. Kindle.] 

 14 



