32 Art. 8. —A. Kryshtof ovich : 



Many pieces about 1-2 cm. in length, of the narrow segments 

 near 3 mm. in width with two longitudinal series of round sori, 

 are seen on some plates of shale. The width of segments cor- 

 responds more to that of Bohemian than of Greenlandian specimens 

 but no complete pinnula has been observed hitherto. 



This type is allied to genus Matonidium by the position of 

 its sori and the presence of a central hole in it but rather to 

 Laccopterls by their round form. 



The edge of the segment is crenate, a little more than is 

 figured by Heek, but possibly that comes chiefly from the con- 

 traction of the soft tissue between the rigid sori. 



The fern has been recorded from the Atane Bed and Untere 

 Quadersandstein of Bohemia and Saxony (Nieder schöna). 



7. Pecopteris virginiensis Fontaine. 



1889 (1890). FoxTAiNE, The Potomac Flora, p. 82, pi. VIII, f. 1-7 ; IX, 



f. 1-6 ; XXIV, f, 2 ; CLXIX, f. 3. 

 1894. Yokohama, (cf.), Mesozoic Plants from Közuke, Kii, Awa and Tosa, 



p. 220, pi. XXIV, fig. 1. 

 1906. Fontaine, Report on various collections of Fossîl Plants from the 



Older Potomac of Virginia and Maryland, in Ward's Status of the 



Mesozoic Floras, p. 480, 538, pi. CXVI fig. 3, 4. 



Locality : Sea-shore at Älgacb. 



On several plates of shale from this locality parts of the frond 

 are seen, with pinnules tapering to the top and slightly acute- 

 dentate on the edge ; the frond is either quite identical with or 

 closely allied to the Virginian species. Phegopteris Kornerupii Hr.^J 

 ft'om the Patoot Bed is nearly similar, but Heee's sketch, which 

 is rather incomplete, shows crenate pinnules instead of dentate. 



1) Heek (1883), p. 3, pi. XLIX, f. 3, 3 b. 



