34 Art. 8. — A. Kryshtofovich : 



once, except the first distal one, of which the first branch forks 

 once more. 



This species is very abundant in the Atane Bed, but scarce 

 in Kome. Heer has described it also from the Beds of Igdlokun- 

 guak in Greenland, but regarded it as Tertiary. Its true age is 

 not yet well known, as the specimens have been found by Steen- 

 STEUP only in pebbles, whose geological origin has not been exactly 

 ascertained. The species was also recorded by me from the Ural 

 Province, and by some other authors from the Cenomanian of 

 Bohemia. Several other ferns recorded under difierent names, 

 such as P. sitkensls Hr.,^^ Pccopleris denticulata Hr.,^^ seem to be 

 closely allied to the present form. Besides, Dawson remarked its 

 close resemblance to Cladophlehis vanGOUveriana Daws.^^ 



9. StenopteHs Jimhoi u. sp. 



Locality : Sea-shore at Mgach. 



The surface of some plates of shale from this 

 locality is richly covered with narrow forking 

 fronds, resembling those of S. virginica Font.''^ 

 Until now only a few species of Stenopterls 

 have been recorded. S. desmomera Sap.^^ has been 



Fig. 4. 



,.,.,.. described from the Kimmeridgian of Lyon and S. 



Stenopteris Jimboi 



»• sp- cretacea Hollick"^ from the Upper Cretaceous of 



(Sketch made ra situ) 



Colorado. Full analysis and discussion of these 

 species will be made after a more complete study of our 

 material. 



1) Heek {18G9 b), p. 21, pi. I, f. 7a. 



2) Heeb (1874), p. 95, pi. XXVI, f. 7. 



3) Dawson (1893 b), p. 55, pi. V, f. i, 5. 



4) Fontaine (1889), p. 112, pi. XXI, f. 8. 



5) Sapoeta (1873), p. 292, pi. XXXII, f. 1, 2 ; XXHI, f. 1. 



6) HoLUCK (1902 b), p. 148, pi. Ill, f. 2. 



