a fe With cells invisible to the naked eye, 
444 TRANS. OF THE ACAD. OF SCIENCE. 
he shaft, more or less parallel, surmounted by a cellular tis- 
be longitudinal septa, and lines of tortuous tubes 
Geol. Pos. and Loc.—Devonian pas Falls of the 
Ohio. In the collection of Dr. B. F.S 
rious investigation that we were enabled to obtain any thing 
approaching a definite view of its organization. The views 
which we have offered will, we believe, be found to be he 
main correct. The great diversity of form presented in 
complex organization under the influence of different Pick 
of weathering rendered it often difficult to determine wh 
r we had under our observation some modification of nor- 
pis dacs goa or some alteration fron atmospheric influ- 
bee will be seen that it resembles the Coscinium of Keyser- 
several features of its organization ; for instance, in the 
or sole ; but it differs by its want of a middle plate se separating 
the cells on one face from those on the other, or by its hav 
in 
ing, in one case, fo “pst of dense stony matter, ie ie 
three tela to aaah opening, to the wp ees: of 
sb grning ona the resemblance of t the form of its fone 
which i is only gradually developed from below Paes Sa : 
i ata, Goldf., resembles our 5 it is pr 
| Pe, coven a fan-sha expansion ori inally ae CE 
co red on the Pi tg face by a thin inca, 
nad resembling - | 
