Maryland Geological Survey 225 



PaNENKA cf. MULTIRADIATA Hall 



Plate XXIII, Fjg. 11 



Panenka multiradiata Hall, 1885, Pal. N. Y., vol. v, pt. i, p. 417, pi. Ixix, fig. 

 5; pi. xclv, fig. 18. 



Description. — Shell large, subcircular or broadly ovate; length greater 

 than the height. Pallial margin regularly rounded from the anterior to 

 the middle of the posterior end, whence it is a little more abruptly curving 

 to the post-cardinal extremity. Anterior end short and regularly rounded. 

 Posterior end expanded. Valves regularly convex below, becoming gib- 

 bous or ventricose in the middle and above. Hinge-line short, straight. 

 Ligamental area short and high. Test thin. Surface marked by numer- 

 ous, closely arranged, flattened or convex radii. Hall, 1885. 



Occurrence. — Romney Formation, Onondaga Member. One mile 

 east of Oldtown in cut of Western Maryland Railroad. 



Collection. — U. S. JSTational Museum. 



[E. M. Kindle.] 



Family PRAECARDllDAE 



Genus BUCHIOLA Barrande 



BucHiOLA halli Clarke 

 Plate XXIII, Fig. 4 



Glyptocardia speciosa Hall, 1885, Pal. N. Y., vol. v, pt. i, Lamellibranchiata 



ii, pi. Ixx, fig. 9; pi. Ixxx, fig. 10. 

 Buchiola halli Clarke, 1904, N. Y. State Mus., Mem. vi, pt. 2, p. 301, pi. x, 



figs. 15, 16. 



Description. — Shell rather small, length greater than the height so that 

 the valve is somewhat elliptical in outline, basal margin regularly curving, 

 convexity regular and greater toward the beak. Surface marked by 11 

 or 12 broad plications, ^ mm. in width on the median portion of the 

 shell, which are limited laterally by an angular slightly raised ridge; the 

 plications are crossed by conspicuous striated raised ridges which are not 

 so strong on the lateral margins and fail toward the basal one, while the 

 ridges are separated by depressions; between the plications are slightly 

 narrower, smooth evenly rounded furrows which show no indication of the 

 15 



