May, 1909.] The Bedford Fauna at Indian Fields, Ky. 
5 21 
Cypricardella (Microdon ) sp. (Fig. 4). The outline anterior 
to the beak is not concave and there is no distinct evidence of an 
umbonal ridge extending diagonally across the shell as in most 
specimens referred to this genus; nevertheless, the generic ref¬ 
erence is believed to be correct. A small triangular tooth is 
found at the beak. Both right and left valves, always much 
flattened, have been found in the thin representative of the 
Bedford-Berea at Indian Fields, Kentucky. The shell appar¬ 
ently was almost smooth. 
Cypricardella {Microdon) sp. (Fig. 5). In case of the spec¬ 
imen figured, the outline anterior to the beak is distinctly con¬ 
cave, there is a distinct small triangular tooth at the beak, and 
posteriorly there is an impression resembling a muscular area 
which is not found in other specimens evidently belonging to the 
same species, and whose significance is conjectural. The trans¬ 
versely elliptical form appears to be specific. The absence of any 
trace of the anterior muscular scar in this and the preceding 
species is noteworthy. In the thin representative of the Bedford- 
Berea at Indian Fields, Kentucky. 
Nuculana kentuckiensis , sp. nov. (Fig. 6). 
Anterior end of shell prolonged beyond the beak in such a manner as 
to produce a transversely oblong outline, the basal margin being com¬ 
paratively straight, and the margin anterior to the beak being approx¬ 
imately parallel to the latter. The cardinal margin posterior to the beak 
concave and inclined as usual. Height of shell, about 4.5 mm.; length, 
anterior to the beak, about 4.5 mm.; total length, at least 10 mm., possibly 
a little more, the posterior extremity not being preserved in the specimen 
which is best preserved. 
In the chin representative of the Bedford-Berea at Indian 
Fields, Kentucky. 
Nuclana sp. (Fig. 3). This shell agrees in outline with Nucu¬ 
lana diversa of the Hamilton and Nuculana pandoriformis , as 
identified by Hall from the Cuyahoga of Newark, Ohio. A 
somewhat similar shell was figured by Herrick from the Bedford 
shale at Central College, Ohio, as Nuculana diversa, but it was 
listed as Nuculana diversa—bedfordensis , a new variety. In the 
thin representative of the Bedford-Berea at Indian Fields, 
Kentucky. 
Macrodon hamiltoniae-irvinensis , var. nov. (Fig. 15). Our 
specimens belong unquestionably to the group typified by 
Macrodon hamiltoniae, but they do not attain as large a size and 
the radiating striae are confined to the post-umbonal slopes. 
Rather common in the thin representative of the Bedford-Berea 
at Irvine, Kentucky. A much flattened valve of a specimen of 
Macrodon from the same horizon, at Indian Fields, may belong 
to the same species. 
