Plate XITI. 
Figs. 1 and 2. Barychilina punctostriata, n. gen. etsp..... | 
Ia, right side, 14, left side, Ic, posterior end, and Id, dorsal view 
of a perfect carapace, x 20. Falls of the Ohio. 
12, small portion of surface, x 75, showing rows of punctures between 
the strize. 
2a, 26 and 2c, three views, x 20, of a worn left valve. 
Fig. 3. Barychilina punctostriata, var. curta, n. sp........ 
3a, 36 and 3c, outline views of a right valve, x 20. 
Fig. 4.°  Barychilina -pulchella; nn: spr. : 230.35 
4a, 46, 4c and 4d, right side, left side, dorsal, and posterior views 
of an entire carapace, x 28 (4d, x 20.) Falls of the Ohio. 
Fig. 5. Pachydomella tumida; n. genset sp.) ee 
52, right side, 54, anterior end, 5c, dorsal view of a complete exam- 
ple, x 28. Falls of the Ohio. 
229 
Hee 
198 
