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Revision of Bryozoan Genera.—Cumings. 217 
Fig. 9. Dekayia ulrichi-robusta (Foord). From the base of the Lor- 
raine, Manchester Station, Ind. Same section as fig. 4, pl. IX. 
Tangential section, * 43. 
Fig. 10. Dekayia aspera E. & H. From the Lorraine, Cincinnati, O. 
Same section as fig. 10, pl. IX. Tangental section, x 43. 
Figs. 11, 12. Homotrypa frondosa (E. & H.) From the top of the 
Lorraine, Harmans Station, Ind. Same specimen as fig. 2, 
pl. XI. Tangential and Longitudinal sections, x 20 
DESCRIPTION OF PLATE XI. 
_ Fig. 1. Dekayia subfrondosa n. sp. From the base of the Lorraine, 
Manchester Station, Ind. Sections figs. 7, 8, pl. IX and 3 and 
7, pl. X, are from this specimen. Natural size. 
Fig. 2. Homotrypa frondosa (E. & H.). From the top of the Lor- 
raine, Harmans Station, Ind. Sections, figs. 11, 12 pl. X, are 
from this specimen. Natural size 
Figs. 3 and 4. Dekayia ulrichi-lobata n. var. Fyrom the lower Lor- 
raine Manchester Station, Ind. Section, fig. 2, pl. I, was cut 
cut from no, 4. 
Homotrypa frondosa (E. & H.). Surface of No. 2, # 20. 
Dekayia perfrondosa nom. nov. Surface, a 20. For comparison 
with fig. 5. 
Fig. 7. Dekayia ulrichi-expansa n. var. From the Lower Lorraine, 
Manchester Station, Ind. Natural size. 
Fig. 
Fig. 
te 
DEscrIPTION OF PLATE XII. 
Fig. 1. Surface of Homotrypa frondosa + 4. Same specimen as pl. 
XI., fig. 2. 
Fig. 2. Surface of Dekayia perfrondosa x 4. For comparison with 
Ast r. 
Fig. 3. Surface of Peronopora decipiens (Monticulipora frondosa of 
Nicholson ) * 4. For comparison with fig. 1. 
Fig. 4. Surface of Dekayia subfrondosa x 4. Same specimen as fig. 
1, pl. XI. For comparison with fig. 2. 
