ae TENTH ANNUAL REPORT. 
deep, nearly 3 inches wide; lamelle 120 very sharp and 
prominent, converging toward the fossette, which is sinking 
from the posterior side deeply over into the anterior wall, 
causing a narrow line through the center and leaving the 
sides of the calyx abruptly sloping. Very faintly the 
smaller two fossettes can be observed. 
Corniferous limestone, Ohio Falls. 
Chonophyllum cylindricum, sp. nov. 
(CBlateawhl: > igess3) 
Corallum simple, erect, cylindrical, gradually tapering; 
length 3 in., lower extremity curved with several processes 
of attachment on its lower side. [Exterior ornamented with 
epitheca marked with strong lamellular striation, small ir- 
regular constrictions, sharp marginate concentric wrinkles, 
partly exfoliated. Calyx 10-16 in. deep, 14 in. wide with 
56 broad flattened lamella descending steeply, the cardinal 
ones occupying one third of the cup. A well developed 
smooth floor is presented, assuming an incline to the wall 
and more so to the fossette, which latter is not prominent. 
The exfoliation shows 13 invaginations of the calyx. 
Corniferous limestone, Ohio Falls. 
Aulacophyllum excenpricum, sp. nov. 
(Plate Villy “Bie ire) 
Corallum simpl:, turbinate for the first in. and 1-4, 
then suddenly bending at aimost right angle assuming a 
very flattened condition of more than one inch in width, 
rallying again constricted and geniculate into a cylindrical 
form with another inclination of departure to the interior. 
The whole length would be 4 in. and 4. Calyx oval, 14 in. 
long, I in. across, with 80 lamellz meeting in steep walls 
at a very narrow center, which begins a little posterial, the 
larger lamellae converging toward the long and deep fos- 
sette. The whole form is denuded and looks like a contorted 
Corallum. A younger one exhibits the same tendency. 
Corniferous limestone, Columbus, Ohio. 
