New Species of Devonian Fossils. 121 



side of which the surface is concave as it slopes away to the 

 margin. The rim of the shallow basal cup is scalloped by six 

 slight, concave depressions for the insertion of the five radials 

 and the anal plate. Since these are all of the same size, the anal 

 was doubtless of about the same width as the radials. These 

 scallops continue to the center of the visceral cup as shallow, 

 concave, radial depressions. Radials and brachials unknown. 



There is considerable variation in the size and thickness of 

 these crinoid bases, the height of the rim, and the proportionate 

 size of the cup. Frequently the base is very thin, appearing as a 

 mere circular ring, while in other cases, as in the specimen shown 

 in Figure 3, it is thickened and spreads beyond the margin of 

 the visceral depression. 



Dimensions: Width of the base of the type specimen, 13 mm.; 

 width of cup, 8 mm. ; height of rim of base, 3 mm. Of another 

 specimen: base, 14 mm.; cup, 12 mm.; height, 2.8 mm. 



Discussion: It is known that E. sacciilus of the Oriskany was 

 sessile in youth and later became free-living, and it is thought 

 that E. pocilliformis may have undergone a similar development. 

 The new species, however, evidently remained attached through- 

 out life. That these are not the bases of young specimens of E. 

 pocilliformis is quite evident from their size, their extreme flat- 

 ness, and especially the fact that E. pocilliformis is exceedingly 

 rare in the formations where this species is abundant. 



Occurrence: Rockhouse shale, at Rockhouse and the sulphur 

 spring. Birdsong shale, at Perryville and numerous localities 

 along Big Lick and Birdsong creeks in Benton and Decatur 

 ' counties. 



CLASS BRACHIOPODA 

 FAMILY ORTHID^ 



Dalmanella pygmaea, n. sp. 



Plate II, figs. 4, 5 

 Description: Shell very small, subcircular to subquadrate in 

 outline, and nearly equally biconvex. Hinge-line one-fourth 

 shorter than the greatest width of the shell, cardinal extremities 

 rather sharply rounded. Area narrow and not extending to the 

 extremities of the hinge-line. Surface covered with very fine 



