May, 1909.] The Bedford Fauna at Indian Fields, Ky. 521 



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 kentiickiensis , 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 thin 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 pandoriforinis, 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— bedjordensis , 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. 



