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A LIST OF THE BRYOZOA OF THE WAVERLY GROUP 
IN OHIO. WITH DESCRIPTIONS OF NEW SPECIES. 
By E. O. Ulrich. 
FENESTELLA HERRICKANA, n. sp. 
(Plate XIH, Fig 2 — 2 d.) 
Zoarium of moderate extent, apparently flabellate and more or 
less undulating. 
Obverse : — Branches comparatively rigid and rather slender, eight 
or nine in 5 mm., 3.5 mm,, to 4.0 mm. wide, increasing very gradu- 
ally to 4.5 or 5.0 mm. before bifurcation takes place ; margins some- 
what wavy ; surface between the zooecia apertures depressed and 
marked with from one to three (usually two) short striations. Carina 
usually distinct but only moderately developed, not sharp, swelling or 
forming tubercles at intervals corresponding nearly to the zooecia 
mouths, occasionally nearly obsolete, in which case the nodes are 
more conspicuous than usual. Zooecia in two ranges, thirteen or 
fourteen in each in 5 mm., apertures four or five opposite a fenestrule, 
circular, 0.2 mm. in diameter, surrounded by well developed peris- 
tome which (in the perfect state) is ornamented by a circle of small 
tubercles. The space between succeeding orifices about equals the 
diameter of a peristome. Opercular coverings slightly convex, with a 
small central elevation. Dissepments thin, depressed, faintly striated, 
rounded or sub-angular. Fenestrules narrow, the length two to four 
times greater than the width; seven or eight in 10 mm. longitudinally. 
Reverse : — Here the branches are strongly rounded and striated 
longitudinally. On old example the striae become nearly or quite ob- 
solete and the whole surface finely granulose. The granules are of 
two sizes, the larger ones being much less abundant and inclined to 
arrange themselves in rows. 
