Jan., 1914.] Solanacem of Ohio. 235 



Protarea vetusta, Streptelasma msticum, S. divaricans, etc. etc. 

 At the top are Schizolopha moorei, Salpingostoma richmondensis, 

 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 Elkhorn 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 Waynes ville. In this latter region a conspicuous 

 band of purple shale appears about 5' above the reef and occurs 

 constantly at about this level ever>'^vhere 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 vSaluda 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. 



SOLANACE.^ 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 phyletic sequence. 

 Easy keys for identification and the distribution in the state, so 

 far as shown by specimens in the state herbarium, should make a 

 studv of the family readily accessible to the amateur botanists 

 of Ohio. 



SOLANACE^. 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 cymose 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, 



