PLATE XV. 
Pace. 
Fig. 1 . -Sphexoptems scaberri.ma, Spec, nova.. ,,.408 
Fig. 2. Pinna of the same, enlarged. 
Fig. 3. Sphivnopteris gracilis, Brgt....408 
Fig. 4, 5, 0. Enlarged pinnules of the same. 
Fig. '7. Sphenoptkris mixta, Sclip. ..409 
Fig. Enlarged pinna of the same. 
