84 
Aug. F. Foerste 
above the Orthoceras fosteri layer. It probably occurs in the 
Clarksville division also at Wyoming, in the southern part of 
Fleming county, where Strophomena elongata is found 9 feet 
below the Strophomena neglecta horizon. At Sunset, in the same 
county, Strophomena elongata occurs at various levels within 12 
feet of the base of the upper Hehertella insculpta horizon, in the 
upper or Blanchester division of the Waynesville. It appears 
to occur in the Blanchester division, or its equivalent, also along 
Silver Creek, northeast of Dunlapsville, in Union county, Indiana; 
at Moores Hill, in Dearborn county; at Madison, in Jefferson 
county ; and at the mouth of Bull Creek, in Clark county. East 
of Jeffersontown, in the eastern part of Jefferson county, Ken- 
tucky, Strophomena elongata occurs 13 feet below the Columnaria 
horizon, in strata regarded as upper Waynesville. 
These data suggest a range from the lower Clarksville to the 
top of the Blanchester, with a gap in the lower half of the Blan- 
chester. 
Strophomena planumbona-subtenta. HalB^ 
{Plate IV, Figs. 4, A, B, C, D; Plate VIII, Figs. 3 A, B; Plate IX, Fig. 2) 
The name Strophomena subtenta was first published by Conrad, 
in the Fifth Annual Report of the New York Geological Survey, in 
1841, on page 37, but no description of the species was given until 
Prof. James Hall published his report in ihoNew York Paleontol- 
ogy, vol. 1, in 1847. On page 115 of this volume, Professor Hall 
stated : 
I find among the drawings of Mr. Conrad, the figure of a Trenton 
species, with this name attached. I have not seen the same in New 
York, but the specimen figured is from a western locality. It bears all 
the essential marks of the species cited, and I have therefore introduced 
it under that name. The strong oblique wrinkles form a distinguishing 
feature. 
Position and locality. In the Blue limestone of Ohio, associated with 
LejAaena alternata, Leptaena sericea, and Orthis lestudinaria. Oxford 
(Ohio). Trenton Falls, on the authority of Mr. Conrad. 
From these notes it is evident that the specimen figured by 
Hall on plate 31 B as Leptaena subtenta is the same specimen 
Strophomena subtenta. Hall, New York Palentology, vol. i, p. 115, 1847. Stro- 
phomena plicata. Meek, Ohio Paleontology, vol. i, p. 81, 1873. 
