CLADOPHLEBIS. 14 5 



The slender rachis gives off opposite and sub-opposite pinnae 

 with short, broad, and apparently entire segments. It is not 

 improbable that this example may be regarded as the apex of 

 C. denticulata. The veins are exceedingly well shown. Cf. 

 specimen 39,240 (PI. XV. Fig. 5). 



It is just possible that this specimen and 39,240 (PL XV. 

 Fig. 5), both of which have pinnules with entire margins, belong 

 to a separate species of the type represented by P. whitbiensis, a* 

 figured by Lindley & Hutton ; but we have not, I think, sufficient 

 evidence to justify a specific separation of these two specimens- 

 from Cladophlebis denticulata. 



Oolitic Shale, Scarborough. Sean Coll. 



Other specimens : V. 376. Fragment of the apical portion 

 of a frond similar to 39,248 (PI. XV. Fig. 4), but rather less ; 

 too small to be determined, V. 3900. A small indeterminable 

 fragment possibly Cladophlebis, sp. in white sandstone, two miles 

 south of Ravenscar, on the Yorkshire coast. The following are 

 undoubted examples of C. denticulata: 10,368, 39,235, 39,277, 

 40,517 (;t very fine pinna with long falcate pinnules 3'7 cm. long), 

 40,559, 52,568 (fertile pinna). 



B. Ferns which afford no trustworthy evidence as to their 

 affinities with existing families. 



2. Cladophlebis lobifolia (Phillips). 



[Geol. Yorks. p. 148, pi. viii. fig. 13, 1829.] 

 (PI. XV. Fig. 6 ; Text-figs. 20-23.) 



1829. Pecopteris lobifolia, Phillips, Geol. Yorks. p. 148, pi. viii. fig. 13. 

 1833. Neuropteris undulata, Lindley & Hut ton. Foss. Flor. pi. Ixxxiii. 



1836. Neuropteris lobifolia, Gbppert, Foss. Farm. p. 206. 

 CJuilantJifs undulatus, Goppert, ibid. p. 248. 



1837. Pecopteris lobifolia, Lindley & Hutton, Foss. Flor. vol. iii. pi. clxxix. 



1838. Pecopteris lobifolia, Sternberg, Flor. Vonvelt, fasc. vii. p. 155. 

 Neuropteris undulata, ibid. p. 137. 



1848. Neuropteris lobifolia, Bronn, Ind. Pal. p. 811. 

 Sphenopteris unduhita, ibid. p. 1171. 



1849. Cladophlebis lobifolia, Brongniart, Tableau, p. 105. 

 C. undulata, ibid. 



