38 
PALAEONTOLOGY OF NEW YORK. 
Stictopora granatula, n. sp. 
PLATE XI, FIG. 16; AND PLATE XXIII A, FIG. 17. 
In part Trematopora rhomlnfera, Hall. Report of State Geologist for 1882. Expl. pi. 11, figs. 15-20. 
Zoarium ramose, flattened; bifurcations moderately distant; branches not 
widely diverging; width, just above a bifurcation, 1 mm., increasing to 2 
mm. Transverse section lenticular, greatest thickness .80 mm. Non-cellu- 
liferous space, at the margin, very narrow, scarcely perceptible. Cell aper¬ 
tures elongate-oval, length .33 mm., width .20 mm.; very closely disposed 
in more or less regular, oblique, transverse rows : margins very thin, slightly 
elevated or obsolete. Intercellular space generally flat and granulose; 
sometimes elevated and smooth. 
This species very much resembles a flattened specimen of Trematopora ( Ortho - 
pora ) rhombifera, and might be readily mistaken for it when only the external 
characters can be seen. 
Formation and localities. In the shaly limestone of the Lower Helderberg 
group, at Catskill creek, and near Clarksville, N. Y. 
PTILODICTYA, Lonsdale. 1839. 
Ptilodictya lirata. 
PLATE XVII, FIGS. 1-4; AND PLATE XXIII A, FIG 20. 
Escharopora lirata, Hall. Twenty-sixth Rept. N. Y. State Mus. Nat. Hist., p. 100. 1874. 
“ “ “ Thirty-second Rept. N. Y. State Mus. Nat. Hist., p. 161. 1879. 
In part Escharopora lirata. Hall. Report of State Geologist for 1882. Expl. pi. 17, figs. 1-6. 1883. 
Zoarium small, ensiform; gradually enlarging for a short distance from an 
obtusely pointed, striated base, the sides then becoming parallel; width from 
1.50 to 2 mm.; transverse section lenticular, greatest thickness .75 mm. 
Celluliferous on both faces. Cells tubular, arising obliquely from the mesial 
lamina. Apertures elongate-oval, length .30 mm., width from .16 to .20 
mm.; disposed in longitudinal parallel rows, five or six rows on each face. 
The apertures of the two outer rows larger than the others and oblique to 
