66 
PALAEONTOLOGY OF NEW YORK. 
Fenestella adornata, n. sp. 
PLATE XXII, FIGS. 7, 8. 
Fenestella, sp. 1 Hall. Report of State Geologist for 1882. Expl. pi. 22, figs. 7, 8. 1883. 
Bryozoum infundibuliform. Branches moderately strong, gently rounded ; very 
gradually and regularly increasing in size to the bifurcations, which are infre¬ 
quent ; marked by from two to three prominent, granulose striations. Width 
of interstices from one-half to two-thirds that of the branches. Dissepi¬ 
ments strong, width .40 mm., six in the space of 5 mm. Fenestrules regu¬ 
larly oval. 
On the celluliferous face the branches are angular. The interstices appear 
narrower than on the opposite face. Dissepiments rounded, much depressed 
below the plane of the branches. Cell apertures small, circular; twenty in 
the space of 5 mm., disposed in two ranges, opening somewhat laterally: 
margins distinctly and equally elevated. Ranges of apertures separated by 
a narrow, slightly elevated carina. 
Formation and locality. Lower Helderberg group, near Clarksville, N. Y. 
ICHTHYORACHIS, McCoy. 1844. 
ICHTIIYORACHIS NEREIS. 
PLATE XXII, FIGS. 19-21. 
Ichthyorachis Nereis, Hall. Twenty-sixth Rept. N. Y. State Mas. Nat. Hist., p. 98. 1874. 
“ “ “ Thirty-second Rept. N. Y. State Mus. Nat. Hist., p 174. 1879. 
“ “ “ Report of State Geologist for 18S2. Expl. pi. 22, figs. 19-21. 1883. 
Zoarium plumose; midrib longitudinally striated, flattened on the non-celluliferous 
face and marked by a groove along the center. Lateral branches or pinnules 
slender, distant from each other about the width of the midrib. There are 
two rows of apertures on the pinnules and three or more on the midrib. 
The largest fragment observed has a length of 17 mm.; width of midrib 
.50 mm.; width of pinnules about .25 mm. 
The specimens are poorly preserved, and the characters of the cell aper¬ 
tures are indistinctly shown. 
