OF DENISON UNIVERSITY. 
6s 
porata^ McCoy. After a careful study of his figures and description it 
seems evident to me that he included more than one species under his 
variety. I am not certain that the form here named in his honor is 
not one of them, while the F. albtda, Hall, and its variety richfield- 
ensis of the present paper most likely served in describing the reverse. 
The specimen from which he prepared his figure of the celluliferous 
side being apparently in a good state of preservation must have been 
different from these, since it shows neither a carina nor striae between 
the ranges of zooecia. If the figure correctly represents his specimen 
I should consider it as clearly distinct from the form here called F. 
meekana. On comparing the figures of the last species with Meek’s, 
other differences may be noted, i. e., the zooecia apertures in the lat- 
ter are more closely arranged, and the fenestrules smaller. 
F. meekana is readily distinguished from all Devonian and Car- 
boniferous species of the genus known to me by the large fenestrules. 
In the absence of a keel the species approaches to the two and three 
mamed PolyporcE. 
Formation and locality: — Richfield. A small fragment that may 
belong to this species occurs on a slab from Lodi, Ohio. 
FENESTELLA ALBIDA, Hall. 
(Plate XIII, Fig. 3 — 3c.) 
Fenestella albida, Hall. Sixth Ann. Kept. State Geol. N. Y., 1887, p. 48. 
Plate VII, Fig. 1-7. 
Zoarium large, probably flabelliform, spreading in a plane, or 
very slightly undulating toward the outer extremity of large fragments. 
The largest fragment seen is 120 mm. long, and about 50 mm. wide. 
Obverse : — Branches very slender, nearly straight, fifteen or six- 
teen in 10 mm., mostly about 0.35 mm. wide; about 0.25 mm. wide 
just after, and 0.40 to 0.50 mm. wide just before bifurcating. The 
branches are sometimes nearly parallel and always diverge rather slow- 
ly, the bifurcations occuring at intervals of usually more than 35 mm. 
and rarely less than 20 mm. Carina thin, slightly, elevated, with 
about four small nodes in 5 mm. Zooecia in two ranges, sixteen or 
seventeen in each in 5 mm.,f the two ranges strongly interlocking in 
the interior. Apertures circular, nearly direct, more than their diam- 
tHall says (loc. cit.) 20, but his figure shows only sixteen in 5 mm. 
