WILLIAMSONIA. 191 



1876. ? Ptilophylluui cutchense, Feistmantel, Pal. Ind. pis. iv.-vi. 



1877. ? Ptilozamites acutifolia, Feistmantel, Pal. Ind. (77 1 ), pi. xl. p. 65; 



(77*), pi. ii. ; (77 3 ), pi. v. 

 ? Ptilophylluui cnteheime, ibid. (77 s ), pi. vi. 



Cf. P. tenerrimi/m, ibid. (77 1 ), p. 66, pi. xli. 

 ? Otozantites ffraeilix, ibid. (77 3 ), pi. vii. 

 ? 0. angustifolius, ibid. pi. vii. 



Cf. 0. distant, ibid. pi. vii. 



1879. Palteozamia acutifolium, Feistmantel, Pal. Ind. (79), pis. x. etc. 

 Ptilophylltim ciitcheiue, ibid. pis. ii. and ix. 

 Otozamites Hislopi, ibid. pi. vii. fig. 4. 

 1881. Otozamites angmtifolius, Heer, Secc. Trab. Geol. Portugal, pi. ix. 



fig. 12. 

 1883. Cf. PtilophyUitm oligoneuron, Tenison-Woods, Proc. Linn. Soc. N.S.W. 



vol. viii. pi. vii. figs. 2 and 3. 



1890. Tterophijllnm pecfen, Schenk, in Zittel, p. 223. 

 1892. WiUiamxonia jjectcii, Fox-Strangways, Tab. Foss. p. 142. 

 jr. f/nxtit/d, ibid. 

 Cf. Ptilop/ti/l/Hni ulii/mit-Hfoii, Jack & Etheridge, Geol. Queensland, 



pi. xvi. fig. 2 ; pi. xvih. fig. 11. 



1900. WiirKiiitxiiniit pecteti, Seward, Manchester Lit. and Phil. Soc. vol. xliv. 

 p. 20, pi. iii. fig. 6. 



Frond pinnate, long and narrow ; uniform in breadth and 

 variable as regards the shape and size of the pinnae. The crowded 

 pinnae are attached to the upper face of the rachis at a more 

 or less acute angle ; the bases of the pinnae are either of the 

 same breadth as the rest of the lamina and have rounded corners 

 or, in some cases, the upper edge of the base is slightly expanded 

 as u basal lobe similar to the auriculate base of an Otozamites 

 pinna. The pinnae vary in shape : some are short and comparatively 

 broad, while others are long and narrow (vide PI. III.), their 

 apices are either gradually tapering and acuminate, or the upper 

 margin may be almost straight and the lower edge suddenly curved 

 upwards to the pointed tip. The veins are spreading at the base 

 of the pinna and approximately parallel through the greater part of 

 the lamina. The petiole is slightly expanded laterally towards the 

 base, which separates by a clean-cut absciss-layer from the stem 

 (vide PI. III. Fig. 7). 



The flowers appear to be of the same type as those of 

 Williamsonia, gigas, but of smaller size, and characterized by the 

 shorter and proportionately broader linear acuminate or lanceolate 

 bracts. The York Museum contains a specimen very similar to 

 that shown in Text-fig. 32. 



