Jan., 1906.] Lower Ordovician in Kentucky. 447 



In all the normal and abnormal flowers the style was of the 

 same form except that it was smaller in the defective flowers 

 mentioned in No. 1. All the abnormal flowers were found on 

 large strong plants, while the flowers on smaller plants growing 

 in poorer soil were all normal, although numerous and of fair size, 



Martynia seems to be a plant peculiarly adapted for studies 

 in variation and peculiar forms of flowers, and it would be very 

 desirable to have some person take up the subject further. 



New Philadelphia. 



CLASSIFICATION AND MAPPING OF THE LOWER ORDO- 

 VICIAN IN KENTUCKY.* 



A. M. :\IlLLER. 



The paper presented the results of the operations of the New 

 Kentucky Geological Survey as they relate to the Lower 

 Ordovician. 



Highbridge is accepted from the Richmond Folio as a saits- 

 facotry name for the "Kentucky River Limestones" known in 

 the Old Kentucky Survey Reports as Chazy and Birdse3'e. Camp 

 Nelson, Oregon and Tyrone are proposed as names for what 

 were formerly known as Chazy, Kentucky River Marble, and 

 Birdseve Proper respectively. Lexington is also accepted from 

 the Richmond Folio, and is divided in ascending order into 

 Curdsville, Logana, Wilmore, Paris and Perryville, the latter 

 being Linney's "Upper Birdseye." 



Flannagan Chert of the Richmond Folio, as the name for a 

 persistent horizon, is dropped. It has been found to truncate 

 beds lying in and just above the Upper Paris where there have 

 been brought to the surface under the influence of slow atmos- 

 pheric weathering. 



Near the summit of the culminating point of the Cincinnati 

 Anticline in Central Kentucky (Jessamine Dome) this horizon is 

 marked by an abundance of phosphate, in some cases rich 

 enough to invite an attempt to exploit for commercial purposes. 

 This deposit is identified as the geological equivalent of the 

 Mt. Pleasant Phosphate of Tenn. 



Winchester is accepted from the Folio referred to above, as 

 the name for the formation coming next above the Lexington, 

 and an attempt is made to assign to it more definite limits than 

 heretofore. A wave marked crinoidal limestone, carrying in 

 northern situations Trinucleus concentricus, is taken as the 

 upper limit of the Winchester. The fauna of the Winchester is 

 found to possess strong Cincinnatian affinities and is accordingly 



* Abstract of paper read Dec. 2, Cincinnati, Ohio St. Acad, of Sci. 



