Silurian Fossils 
87 
specimen^ 21 mm. At Brownsport Furnace^ three miles west of 
Vice landings a specimen having the characteristic surface orna- 
mentation of this species, but at least 37 mm. wide, was found. 
Brownsport bed : Brownsport Furnace, Tennessee; Cerro Gordo; 
Bath Springs; east of George Wilson, seven and one-half miles 
east of Savannah, Tennessee. 
Strophonella semifasciata-brownsportensis, var. nov. 
{Plate II, Fig. 26.) 
At Brownsport a single fragment was found of a Strophonella 
in which the spaces' between the more prominent stride are very 
wide. The finer intermediate striae usually found are entirely 
obsolete in this specimen. Between the stronger stri^ alread} 
mentioned the spaces are either flattened or broadly concave. 
The striae tend to become indistinct toward the beak. Although 
represented only by a small fragment, the specific characters are 
striking. Its -nearest relative is Strophonella semifaseiata, Hall, 
from the Waldron bed, of which it may be only a smaller variety. 
Brownsport bed: Brownsport, Tennessee. 
Stropheodonta (Brachyprion) newsomensis, sp. nov. 
{Plate IF, Fig. 67.) 
Stropheodonta newsomensis is a smaller species rhan Stropheo- 
donta profunda from the Clinton of New York. While occasional 
specimens are quite strongly convex, the convexity of the greater 
number is not sufficiently great to warrant the term profound. 
In the type of Stropheodonta profunda the convexity is stated to 
be three-fourths of an inch, the length of the shell, as determined 
from the accompanying illustration, being 43 mm., and the width 
53 mm. across the middle. A large sized, rather strongly con- 
vex, specimen of Stropheodonta newsomensis has a length of 33 
mm., a width of 36 mm. across the middle and 40 mm. at the 
hinge, and a depth of about ii mm. The valves are thin, and the 
space between them scarcely exceeds 3 mm. nearer the hinge line 
and I mm. anteriorly. The convex ventral valve is marked by 
fine and rather distant radiating striae, between which there are 
sets of three or four still finer stri^. Toward the anterior and 
lateral margins these stri^ become larger and more nearly sub- 
equal, or alternately large and small. The larger striae near the 
