246 
PALAEONTOLOGY OF NEW YORK. 
Stictopora tumulosa. 
PLATE LXI, FIGS. 1S-22. 
Zoarium consisting of a flattened, dichotomously branched frond, arising from 
a spreading base; branches from 2.50 to a little more than 3 mm. in width, 
not expanding before bifurcating; margins parallel; extremities acutely 
rounded; width of non-celluliferous marginal space a little less than 50 
mm.; transverse section flattened-lenticular, abruptly contracting near the 
margins, greatest thickness .50 mm.; bifurcations on the specimens observed 
distant, occurring at intervals of from 12 to 20 mm. or more; branches 
diverging at an angle of about forty-five degrees. Cells tubular, nearly 
parallel with the mesotheca for the greater portion of their length, then 
abruptly turning and opening directly outward. Intercellular tissue vesicu- 
lose, vesicles irregularly disposed. Cell apertures circular, pustuliform, diam¬ 
eter of the opening from .12 to .15 mm., of the pustules about .25 mm., 
disposed in parallel, longitudinal rows, very frequently alternating and form¬ 
ing oblique, transverse rows; apertures of the marginal rows a little larger 
than the others, having a diameter of about .18 min. Peristomes thin, slightly 
and equally elevated, not denticulated. Hanges of apertures separated by thin, 
moderately elevated striations, of which there are usually one or two between 
adjacent rows, but occasionally more; these are generally continuous, but 
sometimes tortuous and interrupted, and occasionally so numerous as to 
somewhat obscure the cell apertures Sometimes the cell apertures are very 
prominent, the bases of the pustules being in contact and presenting a 
crowded or confused appearance. 
_Y- Al' -V- A/- -V- -V- -V- -V- -V- 
-/S'TvW'A'WWW'Tfw 
Formation and locality. Hamilton group, Moscow, Livingston county, N. Y. 
Stictopora striata, n. sp. 
PLATE LXIII, FIG. 22. 
Zoarium consisting of a flattened dichotomously branched frond arising from 
a spreading base. Branches from 3 to 4 mm in width; margins sometimes 
