DESCRIPTION OF PLATE 29—Continued. 
Dielasma ? cf. D. elongatum Schlotheim (p. 327). 
22. A dorsal valve of not quite medium size, showing the muscular imprints. 
23. A small dorsal valve of somewhat different shape. 
24. A small ventral valve. 
Post-Pennsylvanian (?) (K’ui-chéu series), near Ta-ning-hién (station 5). 
Aviculipecten ? richthofeni Girty (p. 328). 
25. Right valve. 
26. Left valve, X 4. 
Post-Pennsylvanian (?) (K’ui-ch6éu series), near T'a-ning-hién (station 5). 
Schizodus cf. S. curtus Meek and Worthen (p. 325). 
27. Internal mold of a right valve. 
Pennsylvanian (Wu-shan limestone, near middle), near Ta-ning-hién (station 16). 
Phillipsia sp. (a) Girty (p. 326). 
28. A somewhat crushed and worn pygidium. 
Pennsylvanian (Wu-shan limestone), near Ta-ning-hién (station 2). 
