BRACHIOPODA. 237 



1913. Anoplia nucleata Schuchert, Geol. Surv. Md. Low. Dev., p. 340, pi. 61, figs. 

 22-24. 



A single internal cast of a pedicle valve is the only specimen representative of 

 this common Oriskany brachiopod. The dimensions are: Length 3 mm., width approxi- 

 mately 4 mm. The valve is extremely gibbous and exhibits the characteristic groove 

 in the beak which extends almost to the middle of the shell. Surface features not 

 preserved. 



Horizon — Upper beds. 



Figured specimen No. 27469 Walker Museum. 



Genus Chonostrophia Hall and Clarke 



Chonostrophia complanata (Hall) 



Plate 63, figures 6-7. 



1857. Chonetes complanata Hall, Tenth Ann. Rept. N. Y. State Cab. Nat. Hist., p. 56. 



1859. Chonetes complanata Hall, Nat. Hist. N. Y. Pal., vol. 3, p. 418, pi. 93, fig. 1, 



1861. 

 1892. Chonostrophia complanata Hall and Clarke, ibidem, vol. 8, pt. 1, p. 311, pi. 16, 



figs. 13-29. 

 1900. Chonostrophia complanata Clarke, Mem. N. Y. State Mus., vol. 3, No. 3, d. 50, 



pi. 7, figs. 1-13. 

 1908. Chonostrophia complanata Clarke, N. Y. State Mus., Mem. 9, pt. 1, p. 210, pi. 



46, figs. 6-13. 

 1913. Chonostrophia complanata Schuchert, Geol. Surv., Md. Low. Dev., p. 341, pi. 62, 

 figs. 1-2. 

 Description — Shell of medium size, broadly semi-circular in outline. The dimensions 

 of an average sized pedicle valve are: Length 20 mm., width 24 mm. Another pedicle 

 valve with a proportionately longer hinge line measures 17 mm. in length and 31 mm. 

 in width. Hinge line equal to the greatest width of the shell; cardinal extremities acute. 

 Pedicle valve concave to nearly flat, slightly convex in the umbonal region, be- 

 coming gently concave toward the margins. Cardinal margin marked with a row of 

 spines inclined towards the extremities on either side of the beak. Latter small, slightly 

 incurved, scarcely elevated above the hinge line, apex pierced by a round foramen. 

 The interior of the valve shows the strongly defined pustulose character of the surface. 

 On the exterior are fine, radiating, bifurcating costae, which are crossed by indistinct 

 concentric lines of growth. In some cases minute concentric striae are preserved. 



Remarks — This species is represented abundantly in the Little Saline beds by the 

 exteriors and interiors of the pedicle valves, but in none of them are the cardinal spines 

 well preserved. The specimens are generally smaller than in the New York Oriskany, 

 resembling in this respect those from the Becraft mountain Oriskany, and those from the 

 Grand Greve limestone, Gaspe, Quebec. 

 Horizon — Lower and upper beds. 

 Figured specimens No. 27468 Walker Museum. 



Order Telotremata 



Superfamily Rhynchonellacea 



Family Rhynchonellidae 



Genus Eatonia Hall 



Eatonia pecuharis (Conrad) 



Plate 62, figures 12-16. 



1841. Atrypa reticularis Conrad, Geol. Surv., N. Y. Fifth Ann. Rept., p. 56. 



1859. Eatonia peculiaris Hall, Nat. Hist. N. Y. Pal., vol. 3, p. 244, pi. 38, figs. 21-26; 



pi. 101, figs. 2a— g; pi. 101, fig. 2; pi. 101a, fig. 1. 



