190 Cincinnats Society*of Natural History. 
tral fourth of the valves. A moderate depression of the surface 
occurs between and extends some distance beneath the largest and 
smallest of the tubercles. 
The wide frill and the arrangement of the three rounded tuber- 
cles sufficiently distinguish this fine species. . 
Position and locality: Shales of the Hamilton group, 18 mile 
creek, N. Y. 
BEYRICHIA LYONI, Nn. sp. 
Flate XIV, Figs. 2 a, b, 6, and 3; 
Right valve ; length, 1.58 mm.; height, 1.1 mm.; thickness, 0.5 mm. 
Left nie us sy peed a Lege 
Valves subquadrate, hinge line straight, anterior cardinal angle 
about go°, posterior angle 110°; posterior and ventral margins 
slightly convex. Frill of moderate width, extending around the 
free margins, frail and easily broken, the posterior portion some- 
times with radial ribs. Surface coarsely reticulate, normally with 
three elevations; (1) a low marginal ridge running parallel with 
the ventral edge; (2) a large, prominent, vertical tubercle, extend- 
ing from the ventral ridge to and often projecting beyond the dor- 
sal edge; (3) a much smaller, circular tubercle. A well-marked 
sulcus-like depression between tubercles two and three is situated 
very near the center of the valves. 
The specimen represented by fig. 3 (pl. XIV) has the ventral 
lobe hypertrophied—at any rate, I have so interpreted the pro- 
nounced oval swelling occurring at the ventral edge. 
The species is named after Mr. Victor Lyon, of Jeffersonville, 
Ind., who has carried on extensive washings of the decomposed 
chert layers at the Falls of the Ohio. This and other species were 
found in a small parcel of the residue which he kindly gave me. 
Position and locality: Devonian Bryozoa bed, Falls of the 
Ohio. 
Size: 
BEYRICHIA (? DEPRANELLA) KALMODINI, Jones. 
FAME ROT VANS) TOG 
Beyrichia Kalmodini, Jones, Quart. Jour. Geol. Soc., Nov. 1890, 
DiI5 sos Dic Kx Me 56; 
Fig. 1a. With frill; length, 1.58 mm.; height, 1.02. 
Size: {Fg er ets uy meson i “© nom: 
6é 66 Without 6 66 1.50 6c 66 0.82. 
