26 Aug. F. Focrste 



the railroad between half a mile and two miles east of Colby, west 

 of Winchester, in Clark county. Near Lexington and Versailles^ 

 specimens are rather common at some localities. It is abundant also 

 along the path leading to the old reservoir southwest of Frankfort. 



North of a line connecting Nicholas and Franklin counties, 

 Orthorhynchida linneyi is very rare. In fact, it is very rare even 

 in Scott and Harrison counties. A single well preserved specimen 

 was found at railroad level at the base of the quarry west of Ivor, 

 opposite Moscow, on the Ohio river. Another was found lo feet 

 above the railroad at the quarry east of Carnestown, about two 

 miles farther up the river. It is very rare also at some localities in 

 central Kentucky, for instance, along the railroad between the 

 tunnel west of Million and Valley View, in Madison county. 



In Tennessee, Orthorhynchula linneyi occurs in the Catheys 

 formation to which the Cynthiana formation of Kentucky is essen- 

 tially an exact equivalent. The underlying Bigby formation of 

 Tennessee has been divided into two members in Kentucky. The 

 upper member, in which Hchertella frankfortensis is common, is 

 called the Paris member. The lower member, in which Prasopora 

 simulatrix is common, is called the Wilmore member. As a matter 

 of fact, HehcrtcUa frankfortensis occurs also in the Wilmore bed, 

 and a species of Prasopora closely similar to Prasopora simulatrix 

 occurs in the Paris member, so that these two members are not well 

 differentiated. The Logana bed of Kentucky is the Hermitage 

 of Tennessee. 



In Woodford county, Kentucky, one mile southeast of McKee 

 feny, and two miles south of the Crow distillery on Glenn creek, 

 east of the road, near the home of Allen McGarvey, on the farm 

 owned by Mrs. Ben Williams, Orthorhynchula linneyi is found in 

 a very hard, fine grained, blue limestone below the Greendale mem- 

 ber of the Cynthiana formation. This fine-grained limestone is 

 regarded as the northern extension of the Perryville bed. In addi- 

 tion to Orthorhynchula linneyi it contains Hebertella parksensis, 

 Lophospira medialis, Lophospira bozvdeni, Loxoceras milleri, and 

 Isochilina jonesi. This appears to be the Dove limestone of Saf- 

 ford's section at Nashville, Tennessee. 



Whenever a species occurs at two horizons separated by a con- 

 siderable interval, it is possible usually to detect at least some 

 slight difference between the two sets of forms, representing the 

 amount of change undergone by the species during the lapse of time 



