CLADOPHLEBIS. 



149 



Text-fig. 23. (Stockholm Museum of Palaeobotany.) 



This specimen, for which I am indebted to the kindness of 

 Professor Nathorst, who also sent me an accurate sketch of the 

 portion shown in the figure, illustrates the manner of occurrence 

 of the son. The sporangia cannot be made out with any degree 

 of clearness, but they appear to have been borne in semicircular 

 pocket-like depressions on the edges of the fertile segments. Cf. 

 V. 3653 (PI. XV. Fig. 6). 



Fin. 1Z.Cladophlebi lobifolia (Phill.). From a specimen and drawing 

 kindly lent by Professor Xathorst. 



V. 3657. Part of a large pinna with pinnules ranging in length 

 from 1-5 to ? cm. ; the individual segments agree precisely with 

 those of Fig. 6, PI. XV. 



V. 3938. Small pieces of two pinnoe with pinnules -7cm. long, 

 intermediate between the segments of such a specimen as that of 

 Fig. 6, PI. XV. and the large forms like V. 2519, 39,257 

 (Text -fig. 21), etc. Cf. ' Neuropteris vndulata,' L. & H., 

 pi. Ixxxiii. 



V. 3939. An imperfectly preserved specimen, with pinnules of 

 median length ; the three lowest pinnae show the large basal 

 segments. 



Upper Shale, Gristhorpe Bay. 



Other specimens : V. 2519, V. 3659, V. 3933, 13,489, 39,229, 

 39,258. 



