A single collection was made in Highland County. On exposed calcareous
rocks. Not previously reported from Ohio, and doubtless rare in the
State.

An occasional 4-celled spore was seen, a transitional character
previously noted by Th. M. Fries. The plant is closely related to the
next below, from which it may not be distinct.


4. Biatorina chalybeia (Borr.) Mudd, Man. Brit. Lich. 180. 1861.

_Lecidea chalybeia_ Borr. in Sowerby, Eng. Bot. Suppl. 1: pl. 2687. f.
2. 1831.

Thallus a thin, smooth or roughened, ash-gray and darkening crust,
forming a continuous layer, becoming inconspicuous and rarely
disappearing; apothecia minute to small, 0.3 to 0.5 mm. in diameter,
adnate to sessile, concave to slightly convex, black, the exciple
concolorous, prominent, and rarely becoming covered; hypothecium dark
brown; hymenium pale below and pale brown above; paraphyses wide and
strong, distinct to coherent-indistinct; asci clavate; spores
oblong-ellipsoid, 8 to 12 mic. long and 3.5 to 4.75 mic. wide (Fig. 4).

Collected in Butler County. On calcareous rocks. Not previously reported
from Ohio, and probably rare in the State.

The spores are somewhat larger than in European specimens.