\VIXLIAMSONIA. 



195 



I hope to describe elsewhere, and in more detail, the 

 structure of this Indian fossil, which is of considerable interest 

 as throwing light on the nature of the stems which bore some 

 of the best known Cycadean fronds. Before describing the 

 English specimens of Williamsonia pecten, a brief account may be 



FIG. 31. ' Pterophylltim rigidum, 1 And. (= ? Williamsonia pecten), from 

 Steierdorf, Banat. From a specimen in the British Museum. No. 41,438. 



given of a few foreign examples, which are of importance as 

 affording evidence in favour of the close similarity or identity of 

 the Yorkshire species and well-known types of fronds from India 

 and Austria. 



Text-fig. 31. 



The figure represents a small piece of a frond from Steierdorf 

 named by Andrae Pteropkyllum rigidum ; J it has the same form as 



FIG. 32. ' Ptilophyllum ctttchense,' Morr., from the Rajmahal Hills, India. 

 B. Basal pinnae. No. V. 2609a. 

 A. Larger pinnse (slightly enlarged). No. V. 2609. 



1 Andrae (53), pi. xi. fig. 42. 



