CLADOPHLEBIS. 143 



I have included this species as a synonym of Cladophlebis 

 denticulata. The preservation is far from perfect, but here and 

 there fine denticulations may be detected. The pinnules are 

 rather less falcate and narrower than in most of the specimens, 

 but I feel no doubt as to their specific identity, and am disposed 

 to attribute the slight peculiarities in the appearance of this frond 

 to the probability of its having been dried in the sun and more or 

 less shrivelled before fossilization. Cf. the fertile pinna? figured 

 by Lindley & Hutton as Phlebopteris undans. 



Scarborough. Bean Coll. 



13,488. PL XX. Figs. 3a and Bb. 



Fig. 3b represents part of a pinna of the form known as 

 Phlebopteris or Pecopteris undans. These fertile pinnules have 

 the same general form as the sterile segments, but are straighter 

 and the margin is distinctly serrate ; the surface of the lamina is 

 raised in the form of oblique ridges or corrugations, parallel to the 

 secondary veins, which are no doubt caused by the occurrence of 

 oblong sori on the lower face. It is unfortunately impossible to 

 obtain any more precise information as to the structure of the 

 eori and sporangia. Cf. Schenk's figures ! of Asplenites ottonis 

 and Heer's 2 figures of Asplenium whitbiense ; also Feistmantel's 8 

 figures of Asplenites macrocarpus. 



The sterile fragment (Fig. 3a) shows the usual type of falcate 

 and finely denticulate segments ; I have no doubt that both these 

 fragments (3a and 3i) belong to. the same plant. 



Upper Shale, Gristhorpe. Presented by Dr. Murray. 



39,240. PI. XV. Fig. 5. 



A small piece of a pinna of a large and well-preserved frond, 

 .agreeing exactly with the specimen figured by Lindley & Hutton 

 as Pecopteris whitbiensis. The margins of the pinnules appear to 

 be entire, but in other respects the segments are exactly like 

 those of 40,518 (PI. XIV. Fig. 4) and 39,236 (PI. XIV. Fig. 1). 

 Labelled by Bean Pecopteris whitbiensis. 



Oolitic Shale, Scarborough. Sean Coll. 



1 Schenk (67), pi. xi. fig. 1. 



2 Heer (77 2 ), ii. pi. xxi. figs. 3 and 4. 



3 Feistmantel (77 1 ), pla. i., xlviii., etc. 



