CORALS AND BRYOZOA. 
87 
Lichenalia (Selenopora) complexa. 
PRATE XXXI, FIGS. 19, 20. 
Lichenalia complexata (by error), Hall. Trans. Albany Institute, vol. x, abstract, p. 11. 1881. 
Pelenopora complexa. Report of State Geologist, for 1885. Expl. pi. 31, fig’s. 19, 20. 1887. 
The manner of growth of this species is the same as that of S. circinda, but 
the cell apertures and vestibular areas are very much larger. Diameter of 
areas .66 mm., of cell apertures .25 mm. 
Formation and locality. Upper Helderberg group, Falls of the Ohio river. 
Fistulipora lamellata. 
PRATE XXX, FIGS. 21-23. 
Thallostigma lamellata, Hall. Trans. Albany Institute, vol. x, abstract, p. 13. 1881. 
Fistulipora “ Report of State Geologist for 1885, advance sheets. Expl. pi. 30, fig-s. 21-23. 18S6. 
Zoarium consisting of very thin lamellate expansions. Cell apertures generally 
circular, sometimes oval, diameter .36 mm.; irregularly disposed, somewhat 
distant. Peristomes strong, distinctly and equally elevated. Surface marked 
by maculse, which are destitute of cell apertures, and distant from each other 
about 5 mm.; the apertures immediately adjacent to these are larger than 
the others. Mesopores minute, indistinct, margins very slightly elevated. 
This species may be distinguished from Lichenalia permarginata by the much 
smaller, more closely arranged cell apertures, and by the presence of meso¬ 
pores ; from F. scrobiculata of the Hamilton group, by its somewhat larger cell 
apertures and very minute mesopores. 
Formation and locality. Upper Helderberg group, Onondaga Valley, Onondaga 
county, N. Y. 
Fistulipora intercellata. 
PRATE XXXII, FIGS. 15-20. 
Thallostigma intercellata. Hall. Trans. Albany Institute, vol. x, abstract, p. 13. 1881. 
Fistulipora “ Report of State Geologist for 1885. Expl. pi. 32, figs. 15-20. 1887. 
Zoarium consisting of thin lamellate expansions incrusting other objects. Cells 
tubular, at right angles to the surface, without septa. Apertures oval, length 
