25 
Caulopteris, Ll. and Hutt. Caulopteris maguifica, 
W Ot S pec: 
(Plate II.) 
Among the numerous silicified remains of plants of 
the carboniferous age, from Athens county, Ohio, that have 
been liberated out of the Mahoning sand-stone, we find quite 
a variety of species grouping under different genera, which 
are by their internal organization closely allied to each 
other. The great interest in these thus preserved plants is 
presented in the minute preservation of internal structure 
by which their classification is greatly facilitated and at 
once obvious. 
Our species here is a well preserved, magnificent tree- 
fern, once beautifying the unbroken wilds of its time. 
Stem half-flattened by compression; scars in longi- 
tudinal series, very large, continuous, acute-elongate, nav- 
iform, joined by their extremities, upper half raised, in the 
middle abruptly terminating with a high embossment 
roughly corrugated; lower half granulated with fine deep 
lines; from abrasion surface of the bark smooth, under- 
surface furrowed, decorticated stem granular-linear, ex- 
posing in short raised lines its structure. This beautiful 
silicified specimen is thirteen inches long and six inches 
across. The scars are 4+ inches long and 14 inches broad, 
deeply impressed. 
The well-preserved internal structure of cross-section 
Fig. 2 exhibits long vernacular woody fascicles of darker 
color, narrow, linear, flexuous, incurved, calvate; unsym— 
metrically arranged. Fig. 3 shows cellular structure of 
an enlarged fascicle; sharp angular, thin-walled; the sur- 
rounding tissue composed of sub-circular, oval cells, Fig. 4, 
loosely joined. These two organizations of tissue form 
the interior character of the plant——Mahoning Sandstone, 
Athens Co., Ohio. 
Cystiphycus latifrons, a New Genus. 
Like many other fucoids this species had the same mode 
of growth. Large, broad fronds enclosing cylindrical stems 
