129 



V. 2523. Two specimens on the same piece of rock ; one of 

 them is from the basal portion of a frond, and shows three main 

 ribs converging towards a common point, as seen in Text-figs. 17-1 9. 



The segments of the other specimen have the long and narrow 

 form similar to that of 39,224 (PI. XIII. Fig. 3). 



Upper Shale, Gristhorpe. Presented by Mr. J. Williamson. 



13,508. In this example the upper portion of the pinna consists 

 of a narrow lamina with dentate edges, similar to the segment 

 shown in PI. XIII. Fig. 3 ; in the lower part the pinna bears long 

 and narrow segments. Cf. V. 2891 (Text-fig. 18). 



39,223. A large specimen about 25 cm. in length. In the lower 

 portion the pinnae are deeply pinnatiscct ; the segments extend 

 almost to the rachis, as in pi. civ. of the Fossil Flora of Lindley & 

 Hutton ; the segments are rather far apart, as in the DictyopJiyllum 

 Leckenbyi form of frond, and they have a crenulate margin. The 

 longest ultimate segment measures 10-5 cm. in length. In the upper 

 part of the specimen the segments become gradually shorter, and 

 the lamina connecting the bases of the segments is broader than 

 in the lower part of the pinna. The margin of the shorter and 

 smaller segments in the upper part of the pinna is entire, agreeing 

 with those of V. 2724 (PL XVIII. Fig. 1). A specimen of this 

 form serves to illustrate the identity of Zigno's D. Leckenbyi with 

 D. rugosum of Lindley & Hutton. Labelled by Bean Phlebopteris 

 Pltillipsii, Phyllites nervulosus, and DictyopJiyllum rugosum. 



Gristhorpe Bay. Bean Coll. 



Other specimens : V. 3669 and 10,370 (similar to 39,224 ; 

 venation clearly shown). 



Family SCHIZ^IACE^E. 



Genus KLUKIA, Kaciborski. 

 [Engler's Jahrb. vol. xiii. p. 1, 1891.] 



The genus Klukia was instituted by Raciborski as a substitute 

 for Pecopteris in the species P. exilis, Phill., on the ground that 

 the sporangial characters proved the fern to be a member of the 

 Schizaeaceae ; a new name was, therefore, wisely chosen to mark 

 a fuller knowledge of botanical affinity than is expressed by the 

 form-genus Pecopteris. 



