Plate XVI. 
Page 
Fig. 1. - Leperditia @) subrotunda, u..sp. 2. 2) 35.2 181 
1a, 16 and Ic, side, front, and ventral views of a left valve, x 20. 
Falls of the Ohio. 
Fig.’ 2. Isochilma rectangularis, n: sp.) 2s. aee 182 
2a, 26 and 2c, three views of a left valve, x 28. Falls of the Ohio. * 
Fig. 3. Aparchites inornatus, m. Sp 92 9:4, 182 
3a, 30, side and ventral views of a left valve, x 20. Falls of the 
Ohio. 
Fig..4. , Moorea bicomuta, spr 25 ee ioe IgI 
4a, 46 and 4c, side, front, and ventral views of a right valve, x 20; 
18 mile creek, N. Y. 
Fig. 5. Aschmina, marginata, messp. 22 ee to ae eo. 
Left valve, x 20. Hamilton group, 18 mile creek, N. Y. 
Fig. 6. Octonaria ovata, n sp.) 4) 194 
6a and 64, right side, and ventral views of an entire carapace, x 28. 
Falls of the Ohio. 
Fig. 7... Octonaria clavigera, n. Sp.-..<.-).. ee 195 
7a, 76 and 7c, side, anterior, and ventral views, x 20, of a right 
valve. Falls of the Ohio. 
Fig. 8. Octonaria stigmata, n. sp:..... 1... 193 
8a and 84, side and front views of a right valve, x 28. 
Fig. 9. Octonaria stigmata, var. oblonga, n. var... 194 
ga, 96 and gc, three views of a valve (? right) of this variety, x 20. 
Fig. 10. Octonaria stigmata, var. loculosa, n. var......... 194 
A right valve, x 28. Species and varieties from Falls of the Ohio. 
Fig. 11. Bythocypris indianensis, n. sp... .- 197 
IIa, 114 and 11¢, side, front, and dorsal views of a left valve, x 28. 
Falls of the Ohio. 
