520 The Ohio Naturalist. [Vol. IX, No. 7, 



Syringothyris sp. A specimen with a short hinge line, as in 

 Syringothyris typa, but presenting onl}^ the hinge area of the 

 pedicel valve and a few of the immediately adjacent parts of the 

 radiating plications, was found at Indian Fields, in the thin 

 representative of the Bedford-Berea. Syringothyris typa is 

 listed by both Newberry and vSchuchert from the Bedford shales 

 at Bedford, Ohio. 



Afnbocoelia nonvoodi, sp. nov. (Fig. 2). 



Pedicel valve much less arched than in most specimens referred to 

 this genus, although it is not known how much of this may be due to 

 flattening. The beak and umbonal parts projects less conspicuously 

 beyond the hinge line. The median depression is reduced to a narrow 

 groove and widens very little anteriorly. The brachial valve is gently 

 convex; the median depression, narrow near the beak, widens consid- 

 erably anteriorly, though remaining comparatively shallow. Concentric 

 lines rather inconspicuous. Length of fairly large specimens, 5 inm.; 

 width about the same. 



Rather common in the thin representative of the Bedford- 

 Berea at Irvine, Kentucky. Named in honor of Prof. C. J. 

 Norwood, State Geologist of Kentucky, who for many years has 

 been keenly interested in the correllation of the various Mississ- 

 ippian strata of Kentucky. 



Camarotoechia kentuckiensis , sp. nov. (Fig. 14). 



Sinus of the pedicel valve and the elevated fold of the brachial valve 

 almost imperceptible in most of the specimens at hand. As a rule, the 

 radiating plications occupying these parts of the shell appear slightly 

 narrower and closer together than those lateral plications which occur 

 within a short distance of the latter. Three plications occur in the 

 sinus and four on the fold. The total number of plications is about 16. 

 The slender vertical lamellae supporting the teeth extend well into the 

 interior of the pedicel valve. The pi-esence of a median septum is dis- 

 tinctly shown in casts of the brachial valve, bvit the evidence of an elon- 

 gate, narrow, median cavity immediately anterior to the beak is met only 

 occasionally. The largest specimens found so far have a length of about 

 10 mm. Judging from the flattened valves and the little depth of the 

 sinus of the jjcdicel valve in our specimens, this species must originally 

 have been one of only moderate convexity. 



Rather common in the thin representative of the Bedford- 

 Berea at Indian Fields, Kentucky. Compared with Camar- 

 otoechia niarshallensis, Winchell, this species is flatter, and with 

 a less elevated fold. The beak of the pedicel valves in normal 

 specimens is more elongate. 



Camarotoechia s,p. (Fig. 11). 



A single brachial valve, IG mm. in length, with G jjlications on the 

 median fold, only slightly elevated above the lateral plications on either 

 side. The numl)er of lateral plications on each side appears to be about 

 four or live. Shells of this type usually are referred to Camarotoechia 

 sappho, but in our specimen the plications appear flatter and broader, 

 especially along the fold. 



Thin representative of the Bedford-Berea at Indian Fields, 

 Kentucky. 



