92 Aug. F. Foerste 
Brownsport bed: Clifton, at the top of the hill back of the town, 
Tennessee. 
Reticularia pegramensis. 
{Plate II, Fig. 31 A, B.) 
Length, 15 mm.; width, 19 mm.; thickness, 10.5 mm. Valves 
subequally convex; median fold of brachial valve low but distinct 
owing to a slight depression of the shell along each side, width of |! 
fold 5 mm. at the anterior margin of the shell; median depression 
of the pedicel valve shallow. No lateral folds or plications. Sur- 1 
face with concentric markings as in Reticularia fimbriata. Sides 
of the fold diverging at an angle of about 20°. Probably identical 
with Reticularia proximay described by E. M. Kindle from northern 
Indiana. 
Brownsport bed: Pegram, Tennessee. | 
Spirifer geronticus. 
{Plate II, Fig. 30 A, B.) 
Width of largest specimen found, 24 mm. Fold of brachial valve, i 
low, rendered more distinct by a narrow depression of the shell 
or groove, on each side; sides of fold diverge at an angle of 27°; 
the groove is most distinct at the beak. On each side of the fold 1 
is a plication which is distinct at the beak but becomes faint and 
disappears about 14 mm. from the beak; a second plication on 
each side becomes faint about 4 mm. from the beak. Sinus of ' 
the pedicel valve sharply defined laterally, the margins of the same 
being formed by a plication which is distinctly defined by a groove 
along its posterior part, the groove becoming less distinct ante- | 
riorly. In addition to the plication which borders the sinus there i 
is a second plication on each side which disappears about 6 mm. j 
anterior to the beak. It is evident that the shell possesses a larger j 
number of plications in its earlier stages of growth than it continues [j 
to develop during its later stages, the ornamentation becoming j 
more simple at maturity. Surface with numerous fine radiating 1 
stride. j 
Brownsport bed; glade southwest of Dixon Spring; hill east of I 
Clifton; four miles northwest of Martins Mills; south of Mr, I 
Phillips’; Pegram, Tennessee. 
