210 The American Geologist. April, 1902. 
Fig. 3. Dekayia ulrichi-inflecta (Ulr.). From the Lorraine at Man- 
chester Station, Ind. -*# 20. 
Fig. 4. Dekayia ulrichi-robusta (Foord). From the base of the 
Lorraine, Manchester Station, Ind. + 20. 
Fig. 5. Dekayia ulrichi-expansa n. var. From the base of the Lor- 
raine, Manchester Station, Ind. -* 20. 
Fig. 6. Dekayia ulrichi-expansa n. var. From the upper Lorraire 
Manchester Station, Ind. # 20. 
Figs. 7, 8. Dekayia subramosa n. sp. From the base of the Lorraine, 
Manchester Station, Ind. 4 20. : 
Figs. 9, 12, 13. Dekayia perfrondosa nom. nov. From the Lorraine, 
Cincinnati, O. 4 20. 
Fig. 10. Dekayia aspera E. & H. From the Lorraine, Cincinnati, O. 
x 20. 
Fig. 11. Dekayia perfrondosa nom. nov. From the base of the Lor- 
raine, Manchester Station, Ind. -# 20. 
Fig. 14. Dekayia perfrondosa-subpulchella (Nich.). From the upper 
Lorraine, Manchester Station, Ind. - 20. 
Fig. 15. Dekayia perfrondosa nom. nov. From the Lorraine, Cincin- 
nati, O. 4 20. 
Fig. 16. Dekayia perfrondosa nom. nov. From the upper Lorraine, 
Manchester Station, Ind. 4 20. 
DESCRIPTION OF PLATE X. 
Fig. 1. Dekayia perfrondosa nom. nov. From the base of the Lor- 
raine, Manchester Station, Ind. Longitudinal section x 20. 
Fig. 2. Dekayia ulrichi-robusta (Foord). From the base of the Lor- 
raine, Manchester Station, Ind. Same specimen as pl. IX, fig. 
4. Longitudinal section, x 20. 
Fig. .3 Dekayia subfrondosa n. sp. From the base of the Lorraine, 
Manchester Station, Ind. Same specimen as pl. LX, figs. 7, %- 
Longitudinal section, x 20. 
Fig. 4. Dekayia perfrondosa-subpulchella (Nich.). From the upper 
Lorraine, Manchester Station, Ind. Same section as fig. 14, 
pl. IX. Tangential section, x 43. 
Fig. 5. Dekayia ulrichi-lobata n. var. From the base of the Lorraine, 
Manchester Station, Ind. Longitudinal section, x 20. 
Fig. 6. Dekayia perfrondosa nom. noy. From the Lorraine, Cincin- 
nati, O. Same section as fig. 9, pl. IX. Tangential section, x 43. 
Fig. 7. Dekayia subfrondosa n. sp. From the base of the Lorraine, 
Manchester Station, Ind. Same section as figs. 7 & 8, pl. IX. 
Tangential section, x 43. 
Fig. 8. Portion of Tangential section of Dekayia subfrondosa n. sp., 
showing median fracture of the interzocecial wall and infill- 
ing of calcite. Same section as fig. 7, pl IX, x 43. , 
