62 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
HPXPLANATION OF PLATES. 
Pcie JUL 
Dalmanella leonensis. 
Figs. 1, 2. Molds of exterior of brachial valves. 
5, 6. Molds of exterior of pedicle valves. 
13. Mold of interior of brachial valve. 
24. Mold of interior of pedicle valve, Chemung formation, Villenova, 
Chautauqua County, New York. 
9. Exterior surface of a brachial valve. 
10. Exterior surface of a pedicle valve, Chemung formation, Westville, 
Chautauqua County, New York. 
(Specimens 9 and 10 were found at side of Chautauqua Creek in a loose 
slab, believed to have fallen from rocks exposed in the creek.) 
Dalmanella danbyi. 
Figs. 38,4. Mold of exterior of a brachial valve. 
, 8. Mold of exterior of a pedicle valve. 
14,15. Molds of interior of brachial valves. 
21,25. Molds of interior of pedicle valves. Danby Dalmanella zone of 
Cayuta member, Chemung formation. Tigs. 4, 8, 14, 15, 21, from 
West Danby, Tompkins County, New York. Figs. 7, 25, from 
Eastern slope Bald Mountain, Caroline, New York. 
Dalmanella danbyi var. beta. 
Fig. 18. Mold of interior of a brachial valve. From middle part of Danby 
Dalmanella zone, West Danby, New York. 
Thiemella villenovia. 
Fig. 11. Mold of exterior of a brachial valve. 
12. Mold of exterior of a pedicle valve. 
16,19. Molds of interior of brachial valves. 
22,23. Molds of interior of pedicle valves. Chemung formation, Ville- 
nova, Chautauqua County, New York. 
Dalmanella allegania. 
Vig. 17. Mold of interior of brachial valve. 
20. Mold of interior of pedicle valve. Chemung formaticn, south Cuba, 
Allegany County, New York. 
Dalimanella superstes. 
Fig. 26. Mold of interior of a pedicle valve. Danby Dalmanella zone, Che- 
mung formation, eastern slope Bald Mountain, Caroline, Tompkins 
County, New York. ; 
27. Mold of interior of a brachial valve. Chemung formation, east 
Elmira at base of hill rising above north bridge crossing Newton 
Creek, H]lmira, New York. 
