458 University Geological Survey of Kansas. 
margins nearly straight. From S. thonii the species here de- 
scribed is separated by its smaller size, ovate form, and ab- 
sence of laceration of the leaflets. 
Formation and locality: Wellington shales, Banner City, 
Dickinson county; Chase formation, Washington. 
Sphenophyllum sp. Pl. LXI, figs. 19, 20. 
An aparently undescribed species of Sphenophyllum is 
present in the collections from the Permian. The leaflets are 
unusually large, 24 mm. long and 9 or 10 mm. wide. They 
slope very gradually from a narrow base to a broad, obtusely 
rounded, dentate or entire apex. The apex is sometimes trun- 
cate or even very slightly emarginate at the center. The leaf- 
lets are clearly distinct at the base and are separated from 
each other by a space as wide or wider than the width of the 
base. The whorl consisted apparently of six leaflets. The 
veins are very fine and numerous. Two or possibly three 
slender veins leave the narrow base, dichotomize four or five 
times at a very narrow angle, and spreading only slightly fill 
the apex, counting around the border about 30 to 35. This 
form is separated from S. obovatum, with which it is asso- 
ciated, by the following characters: Veins finer, more nu- 
merous, and the angle between the dichotomy more acute; 
leaves much longer, but scarcely broader, base much more 
slender and more prolonged. Among the large number of 
specimens of S. obovatum found none seem to be intermediate 
between that species and the form here described. 
Formation and locality: Wellington shales, Banner City, 
Dickinson county. 
Sigillaria sp. 
The genus Sigillaria occurs sparingly in the Wellington, 
although a number of leaves have been obtained. These are 
well preserved. From the upper side the midvein shows as a 
deep depression. The lamina arches from the midrib to the 
border. A few imperfectly preserved Sigillaria stems with 
distant leaf scars have been obtained. These are preserved in 
a sandy or calcareous matrix and are decorticated. Some 
specimens have been found also in the Wreford limestone, six 
miles west of Reece. 
