No, 1596. DAILMANELLAS OF THE CHEMUNG— WILLIAMS. 59 
fig. 12) from near White Sulphur Springs, West Virginia, from 
the faunule described in U. 8S. Geological Survey Bulletin, No. 244 
(1905), p. 35. In the list of faunule it is entered as “6 D. tioga.” 
The exterior of the shell is marked by coarse, uneven, radiating 
lines rapidly bifurcating and fasciculated as shown in fig. 11, Plate 
IV (type-specimen 14 of 1380 B*). 
The pedicle valve is irregularly concave, with sharp beak, greatest 
width near cardinal margin, evenly rounded in front, a median cari- 
nation extending from beak to front bounded by rounded grooves; 
short coarse fasciculated radiating lines, those on the carination 
finer and more even in size than on the sides. These characters 
are shown on fig. 13, Plate IV, illustrating type-specimens, No. 6 of 
1380 B*. of which the dimensions are 13.4 mm. long by 20.2 wide, 
and by specimen No. 10 of the same faunule, fig. 16 of same plate. 
The interior of the pedicle valve has strong cardinal teeth, muscular 
scar sharply defined posteriorly, but its outlines are indistinct pos- 
teriorly; the median carination is sharp at the front edge which is 
indented into a shallow sinus. This is expressed by fig. 10 of 
Plate IV, representing a mold of the interior, No. 7, of 1380 B*. 
DALMANELLA VIRGINIA variety BETA, new variety. 
Plate IV, figs. 14° and 15. 
The casts of the exterior and interior of a small elliptical specimen, 
from the faunule containing the typical specimens of Dalmanella 
virginia, are believed to represent a young specimen of the same 
species. Its form is broadly elliptical, dimensions are 6.4 mm. long 
by 10.8 mm. broad, sides evenly rounded, a well defined sulcus from 
beak to front, fasciculated radiating lines. In the mold of interior 
the mark of the cardinal process is a narrow slit; its trifid termination 
is distinctly evident when magnified. Surface broadly convex. 
Type-specimens are figured on Plate IV. 
Fig. 14 (1380 B® specimen No. 11), exterior mold of brachial valve. 
Fig. 15 (1380 B’ specimen No. 12), exterior mold of same brachial 
valve. 
Locality.—Near White Sulphur Springs, West Virginia, faunule 
described in U.S. Geological Survey Bulletin, No. 244, page 35, under 
locahty No. 1380 B®, 
we 
THIEMELLA, new genus. 
In Hall’s description of Orthis leonensis* a specimen was included 
(fig. 5) which on the following page was referred to as possibly be- 
longing to C. A. White’s species Orthis thiemei,6 coming from the 
DPA ING NS) DV Pte p62, Dle-Virr 
Jour. Boston Soc. N. H., VII, p.- 231. 
