10 
AUG. F. FOERSTE 
the middle; both the outer and inner margins are delimited by 
a narrow linear elevation. On other plates the halves of the 
pectinirhombs lie farther from the margins of the plates, and the 
outer margin as well as the inner margin of the pectinirhomb is 
more lunate in outline. There is no evidence of central nodose 
elevations on any of these plates, nor of any prominent radiating 
sculpture. 
The associated columns are circular in cross-section, with a 
circular lumen. The columnals are of very short height, 15 
occurring in a length of 5 mm. in a column 6 mm. in diameter. 
The ends of these columnals are finely and radiately striated. 
There is no tendency toward the grouping of these columnals 
into more or less nodose or pyriform sections. 
Both the dissociated plates and the associated columns probab- 
ly belong to some undescribed species from among the Lepado- 
cystinae, possibly to Brockocystis. 
Similar plates and columns occur at the same horizon at various 
localities in the southern part of Miami and Clark counties and 
in the northern halves of Miami and Greene counties. No at- 
tempt has been made to determine their area of distribution. 
They are described here chiefly to call attention to the presence 
of additional cystids in the Brassfield formation in the hope that 
more perfect specimens may be found. 
Coiled “crinoid” stem 
Plate /, fig, 6; plate II, figs. 5 A-C 
1884, American Naturalist, p. 57 
A coiled column of some echinoderm, obtained in the upper 
part of the Brassfield limestone in the Soldiers Home quarry, 
west of Dayton, Ohio, was figured by the writer thirty-five years 
ago. This column was at least 11.5 cm. long, but, on the sup- 
position that almost all of the second largest volution is missing, 
an original length of at least 21 cm. is probable. This column 
increased from a diameter of 1.5 mm., at the smaller end of the 
column, to a diameter of 6.5 mm. in a length of 7.7 cm. Beyond 
