77 



129 



Fig. 12. a. D. pusilla (Mett.) O. Ktze. Lower part of two leaves, X ''l.-i, and two pinnæ, 

 fertile and sterile, X I'/a. (orig.). — b. D. brachijpoda (liak.) C. Chr., entire leaf, x *\h, 

 and two pinnæ, X I'/j (orig). — c. D. pseudosancta C. Chr., base and middle part of a leaf, 

 X ^li,, pinna, x I'ls and two segments, x 3 (orig.). — d. D. sanctiformis n. sp. , entire 

 leaf, X '16, pinna X 1' 2 and two segments x 3 (orig.). - e. D. leiicothrix C. Chr.. pinna 

 X ''I5, three segments seen from the underside and one seen from above, X I'la (orig.). 



