206 Cincinnati Society of Natural History. 
ing some distance beyond the contact edges. Peripheral portion 
of frill obscurely crenulated. The generic loop-ridge oblique, with 
bulbous extremities, the anterior bulb very large, sub-globular, 
reaching the dorsal edge; its surface is strongly papillose; the pos- 
terior bulb much smaller, situated a distance nearly equalling its 
diameter from the dorsal edge; curved connecting portion of loop 
ridge-like, rather thin. Surface of valves minutely granulose. 
This is the latest known species having the character required 
by Bollia. It is possible that it is not a true descendant of the 
Silurian and Devonian species of the genus, but may represent a 
modification from such a Beyrichia as the Hamilton BS. sricollina, 
illustrated on the same plate (Fig. 6). I know of no Carboniferous 
species with which it might be confounded, unless it be Beyrichia 
radiata. 
Position and locality: Rare in the siliceous debris of the St. 
Louis limestone, at Elizabethtown, Ky. 
MOOREA GRANOSA, DN. sp. 
TM GO Ge VTIRS Oy. 
Size: Length, 0.47 mm.; height, 0.24 mm.; thickness of right 
valve, 0.1 mm. 
Valves oblong, moderately convex, slightly oblique, elongate- 
subelliptical in outline, with the back straightened, no cardinal 
angles, the ends rounded, the posterior the widest; ventral edge 
gently convex. Surface with a low granulose ridge, running par- 
allel with the ends, and very close to the ventral edge. Near 
center of valve a subcircular, smooth space is encircled by a row 
of granules. A few granules are distributed also in the area 
between this space and the submarginal ridge. ; 
Position and locality: Shaly limestones of the Chester group, 
near Grayson Springs, Ky. 
KIRKBYA OBLONGA, Jones and Kirkby, var. 
Flate XVALL) LOE AG ARO 7.00 
Kirkbya oblonga, Jones and Kirkby, Ann. Mag. Nat. Hist., Ser. 
5, Vol. XV, Plate VIII, Figs. 4-6. 
Fig. 4a,; Length, 0.74 mm.; height, 0.43 mm.; thickness, 0.15 mm. 
Big 15 a oo) eee Ay Ory 2 ace ce te Ou zene te OLS 
The identity of these American specimens with the British Car- 
Size: 
