CYCADOLEPIS. 97 



1. Dory-Cycadolepis. 



The forms included in this section of Cycadolepis are practically 

 such as Saporta describes in his diagnosis of the genus. Saporta's 

 examples are regarded as distinct species, but it is surely un- 

 necessary to institute elaborate specific definitions for such isolated 

 structures, and especially as the so-called species bear a distinct 

 resemblance to one another. Both forms are from the Lower 

 Kimmeridgian of the province Ain. C. villosa is compared with 

 the scales of Stangeria, and C. hirta with those of Cycas and 

 Dioon. It is by no means unlikely that both may belong to 

 Williamsonia ; similar scales figured by Fontaine in a specimen 

 of Williamsonia virginiemis, Fout., 1 from the Potomac beds, and 

 some of the Wealden Williamsonia scales both present a strong 

 likeness to the French specimens, and suggest the possibility 

 of generic identity. A specimen in the Rufford Collection 

 (V. 2830), consisting of a collection of narrow acuminate hairy 

 scales, which is probably part of a cycadean stem, shows some 

 scales very similar to C. hirta, Sap. Feistmantel has figured a 

 specimen of what he calls C. pilosa z from the Gondwana flora 

 of India which agrees very closely with Saporta's examples, 

 also with the leaves of W. virginiensis, Font. The same author 

 figures another form as Cycadolepis* which may perhaps be 

 regarded as a cycadean scale. The specimen figured by Kathorst 

 as Cycadospadix integer angustior, Nath., 4 suggests a form which 

 might be included in the present section of Dory-Cycadolepis. 



V. 2802. Single leaf; linear-lanceolate in form; 7 -5 cm. long, 

 9 mm. broad, delicate hairs on each margin. Appears to be 

 identical with Saporta's " species " C. villosa. Compare V. 2129, 

 in which there are several similar scales aggregated together. 

 Very likely this specimen may be a detached leaf of Williamsonia. 

 Further reference will be made to this form of scale in the 

 descriptions of cycadean stems and some of the specimens of 

 Bennettites ( Williamsonia]. Ecclesbourne. Rujford Coll. 



1 Potomac Flora, pi. cxxxiii. figs. 6 and 7. 

 * Foss. Fl. Gond. vol. ii. pi. vii. fig. 5. 



3 Ibid. vol. i. pt. iv. pi. xiv. figs. 10-12. 



4 Nathorst, loc. cit. pi. xviii. fig. 6. 



