116 
AUG. F. FOEKSTE 
ency toward angulation along the lower margin of the umbilicus, 
and within the umbilicus the inner side of the last volution is 
striated by relatively coarse transverse lines which curve so as 
to present their concave sides toward the aperture of the shell. 
In addition to the conspicuous transverse striae, there are very 
faint, almost obsolete, revolving ridges, not likely to be noticed 
except on exceptionally well preserved specimens. 
Locality and formation.^ — Hillsboro, Ohio; from the Guelph 
formation. From the collection of Henry Pavey, in whose honor 
this species is named. Similar specimens are found in the Ra- 
cine of Wisconsin and the Chicago area. 
Remarks.- — Straparollus paveyi is regarded as related to the 
species described by Lindstrom^^ under the name Oriostoma discors 
Sowerby. In the American species the revolving ridges have 
become obsolete. 
J. A STIGMAEIAN ROOT FROM THE CHESTER FORMATION OF ILLINOIS 
Dictyophlois Foerste 
In the Bulletin of the Torrey Botanical Club, in 1916, a 
Stigmarian root from the Chester formation at Sample, Kentucky, 
was described under the new generic name Dictyophlois, the 
species itself being named Dictyophlois reticulata Foerste. 
Similar Stigmarian roots had long been known in Europe under 
the name of Stigmaria stellata or StigmarUa ficoides stellata. As 
long ago as 1841, Goeppert illustrated this form of root in his 
Gattungen der Fossile Pflanzen (pi. X, fig. 12) from Silesia. It 
appears to range from Great Britain as far east as Russia. 
In Europe, Stigmaria ficoides stellata appears to range over 
about the same territory and at about the same horizon as 
Lepidodendron V olkmanriianum Sternberg, which suggests that 
Stigmaria ficoides stellata may belong to the root system of 
Lepidodendron Volkmannianum. Both appear to be especially 
characteristic of the Culm. 
In America, Stigmarian roots of this type are confined to the 
Chester. • Dictyophlois reticulata, as already stated, was found 
Lindstrom, Sil. Gast. and Pter. of Gotland; 1884, pi. 16, figs. 20-36. 
