Plate XIV. 
Fig. 1.. Beyrichia @ Depranella) kalmediny Jones ssa ee 190 
Ia and 14, side and dorsal views of a left valve, x 20. 
Ic, interior of another perfect left valve, x 20, showing the wide 
concave fill, and other features of the species.) Walle tof aeies 
Ohio. 
Figs. 2 and 3. Beyrichia lyoni, n. sp 
2a, 26 and 2c, side, dorsal, and posterior views of a right valve, 
x 20. | Halls of the Ohio; 
3, a left valve, with hypertrophied ventral lobe, x 20. 
Fig. 4 Beyrichia radiata, var. cestriensis, mn. vam ae 204 
4a and 44, side and posterior views of a left valve, x 28. 
Fig. 5: Bolliatobesa,, mn. sp 00) 189g 
5a and 54, side and front views of a left valve, x 20. 
5¢, longitudinal section through center of valve. Falls of the Ohio. 
Fig. 6. Bollia ungula. Jones. 31... 2 a 188 
6a and 62, side and posterior views of a perfect left valve, x 20. 
Falls of the Ohio. 
Fig. 7. Primitia cestriensis, var. caldwellensis, n. var...... 202 
7a, 7 and 7c, side, posterior, and ventral views of a right valve, 
x 254) Caldwell Co may: 
Fig. 8. .-Primitia subequata, m:(sp..-. 22 ee 202 
8a, 86 and 8c, side, front, and ventral views of a valve of this spe- 
cies, x 26.) iCaldwell'Co mika: 
Nig. io: sCypricdimnaherzeni, ma spe: Lie ao a 209 
ga, 96 and gc, three views of a left valve, x 20. Richfield, Ohio. 
