May, 1909.] Tfie Bedford Fauna at Indian Fields, Ky. 515 



apparently random division of the chromatin in amitosis the 

 number of chromosomes in the species studied is constantly four. 

 Moreover, in some of the spindles in clusters of nuclei undoubt- 

 edly formed by amitosis, the same number is clearly shown. The 

 bearings of these observations except as they tend to demonstrate 

 that amitosis by constriction is a normal process may, however, 

 be left for discussion in the fuller paper which is to follow. 



The figures are camera drawings made with 1.5 mm. objective 

 and an ocular 12. They are enlarged 2130 times. 



Fig. 1. A large nucleus constricting into a cluster of nine or 

 ten daughters. 



Fig. 2. (a) A cluster of daughter nuclei, constriction com- 

 plete, (b) One of the adjacent parent nuclei of the same cyst. 



Fig. .■). A cluster similar to Fig. 2, but beginning to give off 

 small nuclei by nuclear gemmation. 



Fig. 4. A similar cluster of two daughter nuclei. 



THE BEDFORD FAUNA AT INDIAN FIELDS AND IRVINE, 



KENTUCKY.* 



Aug. F. Foerste. 



The stratigraphic succession of the chief divisions of the 

 Waverly in Ohio, in descending order, is: 



6. Logan formation, chiefly sandstones. 



5. Black Hand formation, sandstones, often coarse, and 

 locally conglomeratic. 



4. Cuyahoga formation, sandstones and clay shales. 



.3. Sunbury formation, fissile black shales. 



2. Berea sandstone, often ripple marked. 



1. Bedford clay shales, locally with sandstones. 



In 1888, Mr. E. 0. Ulrich, in the fourth volume of the Bulletin 

 of Denison University, identified from the Upper Waverly of 

 Ohio sixteen species of bryozoans which occur also in the Keokuk 

 of Kentucky, Illinois and Iowa. Of these, eight are found at 

 King's Mountain, Kentucky, in strata identified by Ulrich as 

 Keokuk, and two other species are closely related to forms found 

 at that locality. From this it is evident that the upper Waverly, 

 now known as the Logan formation, is closely related to the 

 strata exposed at King's Mountain, and that both are approx- 

 imately equivalent to the Keokuk of the Mississippi Valley. 



In a paper read before the Geological Society of America, at 

 Baltimore, in 1908, Prof. Stuart Weller expressed the conviction 

 that the richly fossiliferous strata exposed at the Button Mold 



* Published by permission of Professor C. J. Norwood, Director of the 

 Kentucky Geological Survey. 



