30 
Aug. F. Foerste 
In the case of one brachial valve, the inner margins of the two 
lobes of the cardinal process are almost in contact with each 
other, forming subparallel ridges along the posterior faces of the 
lobes. Broad and shallow grooves separate these ridges from the 
postero-lateral margins of the lobes, which practically are in 
contact with the crural ridges. These features may not be char- 
acteristic of the species. In another specimen there is a broad 
median elevation separating two obovate muscular scars, \vhich 
posteriorly are traversed by short, moderately radiating lines, 
and anteriorly give rise to the two outer, and more conspicuous 
subparallel ridges of the group of four which limit the median 
vascular sinuses in the genus Strophomena. 
The type specimens were collected on the farm of C. H. Bowyer, 
half a mile northeast of Becknerville, in Clark county, Kentucky. 
Specimens occur also at several localities from a mile to a mile and 
a half northwest of Becknerville, on the road to Pine Grove. The 
station labelled Pine Grove on the Richmond sheet of the United 
States Geological Survey, at present is named Colby. Near 
Becknerville, Strophomena vicina is associated with Dinorthis 
ulrichi, Hehertella frankfortensis, and Rhynchotrema inaequivalve. 
The same horizon is exposed at Flanagan. Here the following 
section is exposed in descending order. The rock is limestone. 
Only the ranges of the included fossils are indicated. 
Numerous specimens of Allonychia flanaganensis, 11 cm. in length 
from the beak along the umbonal ridge, hinge area 6.5 cm. in 
length extending 5 to 8 mm. anterior to the tip of the beak, 
hinge area 4 to 6 mm. high, shell surface apparently smooth. 
Granular limestone 11 ft. 
Granular limestone, one large Hebertella frankfortensis 5ft. Gin. 
Road crossing, a mile and a half northeast of Flanagan. 
Granular limestone with Rhynchotrema inaequivalve 5 ft. Gin. 
Road crossing. 
Granular limestone northward, claj'ey with abundant chert frag- 
ments southward 3 ft. 6 in. 
Chiefly weathered to clay, with argillaceous, fine-grained rock 
masses remaining in places. At this and the immediately over- 
lying horizon, the typical Flanagan chert makes its appear- 
ance 5 ft. 6 in. 
Road crossing. 
Strophomena, very thin, finely-striated specimens which may not 
belong to Strophomena vicina. Also a variety of Rhynchotrema 
inaequivalve 6 in. 
