Jan., 1914.] 
Solanacece of Ohio. 
235 
Protarea vetusta, Streptelasma rusticum, S. divaricans, etc. etc. 
At the top are Schizolopha moorei, Salpingostoma riehmondensis, 
Platystrophia lynx, the species of Platystrophia, Strophomena, and 
Streptelasma listed above, Rhynchotrema capax, Protarea vetusta, 
etc. etc. 
On Big Sains Creek near Laurel the 55' of strata between the 
second reef and the Silurian are largely barren. No good exposures 
at this level are seen between Laurel and Elkhom Creek. But 
between these places the fossils become differentiated into the 
distinct Whitewater and Elkhorn faunas. 
Nowhere on the upper half of the Cincinnati arch was more 
than a local unconformity seen between the Richmond and the Sil¬ 
urian. Usually it was quite difficult to tell just where Ordovician 
ended and Silurian began. 
The upper reef varies in position from immediately beneath 
the contact three miles west of Madison, to an extreme of 14' be¬ 
neath it near Waynesville. In this latter region a conspicuous 
band of purple shale appears about 5' above the reef and occurs 
constantly at about this level everywhere on the east side of the 
arch. 
To summarize in conclusion, all of the Elkhorn and nearly all 
of the Whitewater are but the deeper water equivalents of the 
shoal water Saluda to the south. 
Second: The only Saluda in Ohio is in the northern part of 
Butler and southern part of Preble Counties. 
Third: The third coral reef and the purple shale together 
show that the top of the Ordovician is quite uniform and that any 
unconformity is but slight, and close examination of the contact 
bears this out. 
Oxford, Ohio. 
- v 
SOLANACECE OF OHIO. 
Amy Williams. 
In the following study, the genera and species have been ar¬ 
ranged in what appears to the writer to be their phvletic sequence. 
Easy keys for identification and the distribution in the state, so 
far as shown by specimens in the state herbarium, should make a 
study of the family readily accessible to the amateur botanists 
of Ohio. 
soLANACEiE. Potato Family. 
Herbs, shrubs, vines, or some tropical species trees, with alter¬ 
nate or rarely opposite leaves without stipules, and with hypo- 
genous, bisporangiate, regular or nearly regular cvmose flowers. 
Calyx mostly 5-lobed; corolla sympetalous, mostly 5-lobed, the 
lobes induplicate-valvate or plicate in the bud; stamens united 
with the corolla, as many as it’s lobes and alternate with them, 
