p. 1

Fenestella cribrosa, Hall, Pal. of N.Y. vol. 2 p 66 pl 40D fig. 3

Frond expanded or cyathiform branches strong, irregularly bifurcating surface striated; transverse bars or dissepiments thin scarcely enlarging at their junction iwth the branches: fenstrules mall quadrangular, sometimes oval; poriferous side unknown, - Fenestrules eleven in the space of three lines longitudinally & eighteen in the same space transversely.