CORALS AND BRYOZOA. 
255 
Stictopora palmipes. 
PLATE LX, FIGS. 19, 20. 
Stictopora palmipes, Hall. Trans. Albany Institute, vol. x, p. 189. 1881. 
“ “ “ Report of State Geologist for 1883, p. 41. 1884. 
Zoarium consisting of a flattened, dichotomously branched frond ; base thin, 
spreading, attached to foreign bodies; for a distance of 2 mm. above the base 
the stipe is nearly cylindrical, with a diameter of less than 1 mm., then 
rapidly expanding to a width of 3 mm. The mode of growth is different 
from that of the usual forms of Stictopora ; in addition to the ordinary 
bifurcating branches there are intermediate lateral branches or lobed expan¬ 
sions, which are very short, not exceeding 1.50 mm. in length and generally 
about 1 mm. wide, with the extremities, rounded ; transverse section 
lenticular, greatest thickness observed 50 mm.; the non-celluliferous mar¬ 
gin is fiat, very thin, having a width .50 mm or more, bordering the entire 
frond, occupying all the space between the lobes or lateral branches; the 
celluliferous portion has thus somewhat the appearance of incrusting a flat, 
smooth surface. Cells tubular, recumbent, for a portion of their length 
abruptly curving and opening directly outward. Intercellular tissue con¬ 
sisting of irregularly disposed vesicles. Cell apertures oval, length about 
.20 mm., width a little more than one-half the length, disposed in regular 
longitudinal rows, the apertures of the marginal rows being a little larger 
than the others. Peristomes thin, equally elevated, not denticulated on 
the fronds observed. Rows of apertures separated by prominent ridges, 
having a width of .10 mm or more, much elevated above the peristomes, 
and very frequently partially obscuring the apertures and having conspic¬ 
uous, equi-distant, conical nodes, ten in the space of 5 mm. 
-V- -V- -V- -V, -AL -V- -V- -V- A/, 
'Tv' 'TV' “7V "Tv- '7V 'A' 'Tv' *7v' '7V 
Formation and localities. Shales of the Hamilton group, West Hamburg, Erie 
county; Pavilion, Genesee county, and near Canandaigua lake, Ontario county, 
New York. 
