98 



G. Ii. Wieland — Ilhtorlr Fo^U Ci/carfs. 



(3) Williamsonia gigas (Paris Museum specimen with 

 leaves attached).* — This is by far the most important specimen 

 of the James Yates collection of Williamsonias from the Jnras- 



Williamsonia gigas (Echantillon No. 2399a Jardin cIps Plantes, Paris, Col- 

 lection Yates, 182?). Terrainoolithique inferieure, Scarborough et Whitby. 



The fronds to the right are of an old series ; above these are large scale 

 leaves somewhat interiorly to which rise the petioles evidently of a younger 

 series of full grown fronds, — the main axis ending in a forked bract envel- 

 oped peduncle and possibly being capable of further growth after the pro- 

 duction of its flowers, just as is the Cycas axis, (f natural size.) 



* The present drawing of this remarkable cycad is superposed on a 

 photograph furnished to me through the great liberality of the officials at 

 the Jardin des Plantes. 



