PAGIOrHYLLUM. 291 



Pagiophyllum Williamsoni (Brongniart). 



[Prodrome, p. 83, 1828.] 

 (PL X. Figs. 2 and 3 ; Text-fig. 52.) 



1828. Lycopodites Williamsoni*, Brongniart, Prodrome, p. 83. 



1829. Lycopodites nncifolius, Phillips, Geol. Yorks. p. 147, pi. viii. fig. 3. 

 1833. Lycopodites Williamsonis, Lindley & Hntton, Foss. Flor. vol. ii. 



pi. xciii. 



1848. Walchia Williamsonis, Bronn, Ind. Pal. p. 1374. 



1849. Palissya? Williamsonis, Brongniart, Tableau, p. 106. 



1849. Moreaunia Williamsonis, Pomel, Amt. Bericht. Versam. Naturforsch. 



etc. p. 352. 



1850. Lycopodites Williamsonis, Unger, Gen. spec, plant, foss. p. 273. 



1851. Palissya? Williamsonis, Bunburv, Quart. Journ. Geol. Soc. vol. vii. 



p. 191. 

 1854. Walchia Williamsonis, Morris, Brit. Foss. p. 24. 

 1864. Lycopodites Williamsonis, Leckenby, Quart. Journ. Geol. Soc. vol. xx. 



p. 76. 

 1870. Pachyphylltdn Jf r i//'ni,iisoni, Schiiujicr, Trait, pal. veg. vol. ii. p. 251. 

 1875. Walchia Williamsonis, Phillips, Geol. Yorks. p. 230, pi. viii. figs. 1 



and 3, lign. 61. 

 1884. Pachyphyllum ? Williamsoni, Saporta, Pal. Franc,, vol. iii. p. 306, 



pi. clxii. figs. 1, 2. 

 1890. Araucarta Williamsoni, Schenk, in Zittel, p. 280. 

 1892. Walchia Williamsonis, Fox-Strangways, Tab. Foss. p. 141. 

 1894. Cf. Payiophi/llum falcatum, Bartholin, Bot. Tidsskrift, p. 100, pi. v. 



fig. 4. 

 1897. Elatides Williamsonis, Nathorst, Mesoz. Flora Spitzbergens, p. 34. 

 1900. Pagiophyllum Williamsoni, Seward, Manchester Lit. and Phil. Soc. 



vol. xliv. p. 16. 



Type-specimen. The specimens figured by Lindley & Hutton 

 (pi. xciii. figs. 1 and 2) are in the Manchester Museum (Nos. 16 

 and 48). The original of Phillips' figure (pi. viii. fig. 1) is in 

 the York Museum. 



Vegetative shoots are monopodially branched, the latest branches 

 being given off at an acute angle ; the leaves, which are thick and 

 fleshy, angular in form, and with a falcate, acuminate, and dorsally 

 keeled distal portion, are crowded and spirally disposed. 



The female cones, about 6 cm. in length, consist of a central axis, 

 bearing imbricate scales with broadly acuminate tips; the male 

 cones have a length of rather more than 2 cm. ; the sporophylls 

 are given off at right angles from a fairly stout axis ; they have 



