PLATE XV. 



PAGK. 

 Fig. 1. SPHKXOPTKRIS SCABKRRIMA, Spec, nova . , , 408 



Fig. 2. Pinna of the same, enlarged. 



Fig. 3. SPHKSOPTERIS GRACILIS. Brgt , t 408 



Fig. 4, 5, 6. Enlarged pinnules of the same. 



Fig. 7. SPHENOPTKRIS MIXTA, Schp . . . . , . 409 



Fig. 6. Enlarged pinna of the same. 



