42 TENTH ANNUAL REPORT. 
structure. Of interest also are two superimposed petioles 
extending out 2 inches from the middle of the stem. Found 
in a cherry nodule. In the same locality I found Caulop- 
teris antiqua and C. perigrina described by Dr. Newberry in 
1871. Named in honor of Prof. W. A. Kellerman, occupy- 
ing the chair of Botany in the Ohio State University. 
—Corniferous Limestone, Delaware, Ohio. 
Stemmatopteris distans, sp. nov. 
(Fig. 2. Reduced one-half). 
The upper extremity of a trunk, 64 inches of equal 
length and width and 1 inch thickness as indicated by the 
transverse section. It is rounding up cupulo-like and the 
sharp edges show the terminations of vascular fascicles 
constituting the structure of the plant, which seems com- 
pressed; but the fascicles are of the form as in Psaronius 
vermicularis. All look compressed and still the inner bun- 
dles seem undisturbed. The transverse section shows also 
the pithy center elongated with the long curved fascicles 
around which the outer fascicles group. One side of this 
plant presents three large distinct scars of a Stemmatop- 
teris, 2 inches in length and one inch wide and about two 
inches apart. — Coal Measures, Athens Co., Ohio. 
Psaronius vermiculus, sp. nov. 
(Plate ITI.) 
Trunk 2 feet 6 inches high, 1 foot in diameter, at the 
base 1 foot 7 inches wide; outer markings roughly longi- 
tudinally wrinkled with occasional rugose elevations running 
out at the spreading base like promontories of roots on trees. 
‘The lower surface of the perfect root-stock is a straight 
truncate level, crossed with grooves and rugose elevations ; 
no trace of any roots or outrunners can be detected. An- 
other speciman of almost that size and more silicified, is 
-characterized at its inferior part in the same manner. The 
‘truncate superior of our specimen is flattened and not well 
