J'ariatioiis of the Ordoz'ician of Indiana. — Foerste. 99 
branch of Lock Lick creek. Half a mile northwest of Dills- 
boro station, at the crossing of the road leading north to 
Chesterville, the upper horizon of Strophomena planiconvexa 
occurs II feet above the railroad crossing and about 35 feet 
below the Bellevue or Lower Platystropliia lynx horizon. 
West of Guilford, northwest of the home of George Frieden- 
berg, the upper Strophomena plaiiiconvexa horizon is 60 feet 
above the lower. At the lower horizon, 54 feet above the rail- 
road track, the specimens are small and are associated in the 
same blocks with Fleet orthis, small Flatystrophia, and rare 
specimens of Dalmanella iniiltiseeta. The fossil varies in size, 
form, and coarseness of the radiating plications, all variations 
being found at both horizons. This is an interesting case of a 
general recurrence of a species at different elevations. Furth- 
er search will probably result in finding occasional specimens 
also at intermediate horizons. 
Strophomena plan\imhona ranges throughout the W'aynes- 
ville bed, although it is comparatively uncommon in the lower 
half. At Concord, Kentucky, it is abundant between 30 and 
35 feet below the top of the bed. It is comparatively common 
and widely distributed in the upper third of the \\'aynesville 
bed, and also in the Liberty bed. It occurs also sparingly in 
the Whitewater bed, although Strophomena vetusta is far 
more abundant here. The variety elongata is widely distrib- 
uted in the Waynesville bed. Strophomena neglecta occurs 
at ]\Ioores Hill about 15 feet below the top of the Waynes- 
ville bed. It is associated with forms not to be distin- 
guished from Strophomena vetusta, so that Strophomena 
vetusta apparently begins its range in the upper part of the 
\\'aynesville bed although most common and most character- 
istic of the Whitewater bed. Strophoinena neglecta occurs 
also at the Xick Senefeld locality, at the north end of frac- 
tional section 26, south of Brookville, 25 feet below the top 
of the Waynesville bed. and also on Silver creek, opposite the 
home of Robert Martin, at approximately the same horizon. 
At Richmond, Indiana, Strophomena neglecta occurs sparingly 
at the top of the Whitewater bed. Strophomeiui z-etusta has 
been found in the lower part of the Madison bed in Indiana. 
Strophomena nutans is widely distributed in the Waynesville 
bed : one specimen was found in the Liberty bed at Oregonia, 
