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RELATION OF THE SPADES SECTION TO Cur 18 NEAR WEISBURG. 
In all parts of the Tanner’s Creek section there is a general dip of 
five feet to the mile, and we may ,assume that this dip holds over the 
five miles from Weisburg to Spades. This places the base of the White- 
water, which is exposed in the cut 18 just north of the station at Weis- 
burg, seventy-five feet below the railway grade at Spades. In the Rich- 
mond section of the Whitewater, where the whole of the formation is 
exposed, a similar thickness is found, leading us to conclude that the 
outcrop one mile west of Spades represents the upper strata of the 
Whitewater. The position of the latter outcrop in reference to the 
Whitewater in the Ripley County locality is shown on the accompanying 
chart. The lines of dip have been extended to Batesville, five and one- 
half miles northwest of Spades, where there is sixty feet of Whitewater, 
portions of which are exposed in the stream gullies a few miles south of 
Batesville. 
RANGE OF THE SPECIES FOUND AT SPADES, INDIANA.* 
Byssonychia grandis Ulrich, Upper Richmond. 
Byssonychia obesa Ulrich, Whitewater. 
Calymene callicephala Green. Common throughout the Cincinnatian, 
especially at the top of the Waynesville. 
Dalmanella meeki (Miller). Corryville-Arnheim and Waynesville. 
Platystrophia laticosta (Meek). McMicken, Maysville and Richmond. 
Lophospira trophidophora (Meek). Whitewater. 
Platystrophia acutilirata (Conrad), Waynesville, Liberty and Whitewatcr. 
Platystrophia acutillirata senex (Cumings). Upper Whitewater. 
Platystrophia laticosta (Meek). McMicken, Maysville and Richmond. 
Protarea richmondensis (Foerste). Waynesville, Liberty and Whitewater. 
Rafinesquina alternata (Hmmons). Throughout the Cincinnatian. 
Streptelasma rusticum (Billings). Waynesville, Liberty, Saluda and 
Whitewater. 
Arthropora shafferi (Meek). Throughout the Cincinnatian. 
Bythopora delicatula (Nicholson). Coryville-Arnheim and Richmond. 
Dicranopora emacerata (Nicholson). Maysville and Richmond. 
Hallopora cf ramosa. Richmond. 
Helopora elegans Ulrich. Liberty and Whitewater. 
*See ‘Stratigraphy and Paleontology of the Tanner’s Creek Section of the Cincinnati Series 
of Indiana.”’ 
