64 
BULLETIN OF THE LABORATORIES 
This beautiful species may be compared' with the F. cingulata^ 
from the Keokuk group of Illinois, which likewise has a row of min- 
ute granules upon the peristomes of the zooecia. That species how- 
ever, has a more compact and robust aspect, stronger dissepiments 
and shorter fenestrules. F. compressa,^ from the same horizon in 
Kentucky has a much higher keel, and differs in other aspects. 
Formation and locality: — Not uncommon at Moot’s Riin, Lick- 
ing Co., O. Rare at Richfield, Ohio. 
FENESTELLA M EEKANA, n. sp. • 
(Plate XIII, Fig. I — ib.) 
Zoarium of lax growth, probably flabellate, spreading nearly in a 
plane and, so far as known, not exceeding 50 mm. in height. , ^ . 
Obverse: — Branches rather strong and straight, seven or eight in 
10 mm., with an average width of .05 mm., increasing from about 
0.45 mm. immediately after bifurcation to about 0.60 mm., before the 
next division takes place. Bifurcation recurring at intervals, varying 
between 6.0mm. and ii.o mm. Carina obsolete; median region of 
branches with two to four rather unequal and irregularly flexuous 
striae, and an occasional node. Spaces between zooecia apertures 
usually with two or three short striae. Zooecia in two ranges, ten in 
each in 5 mm.; usually six or seven opposite each fenestrule, but, the 
length of the latter being variable, it sometimes happens that eight or 
even nine may be observed. Apertures circular^ 0.12 mm., in diam- 
eter, separated two and one-half times that distance, with the margin 
thick and elevated but not ring-like. Opercula occasionally preserved, 
slightly convex and radially marked around the small central perfora- 
tion or boss. Dissepiments striated, depressed, less than half the 
width of the branches, but expanding at their junction with them. 
Fenestrules large. Varying from 0.7 to 1.2 mm. in width and 2.2 to 4.5 
mm. in length, averaging, however, about three in 10 mm. 
Reverse: — On this side the branches and dissepiments are rounded 
and marked by granulose striae, four or more on each branch. 
In Vol. II Pal. of Ohio, Meek describes from about the same 
horizon at Lodi, a form which he separates as a variety of F. 7 nulti- 
■'=-'This mark appended to a species signifies that it is one of those described 
by me in theforthcoming Vol. VIII of the Reports of the Illinois Geological Sur- 
vey. 
