On the Genus Myeloxylon (Brong.). 
BY 
A. C. SEWARD, M.A., F.G.S., 
Lecturer in Botany in the University of Cambridge. 
With Plates I and II. 
I N Myeloxylon 1 we have one of those genera of palaeozoic 
plants with which palaeobotanists have long been 
familiar, but as to whose botanical affinity the balance of 
opinion appears to be fairly equally divided. Numerous 
examples have been figured from English, German, and 
French localities, but none with tissues sufficiently well- 
preserved to admit of a complete examination of their 
anatomical characters. Without claiming for the specimens 
described in the present paper that they settle the botanical 
position of the genus, I hope to show that they afford 
further evidence in support of the view that Myeloxylon 
agrees more closely with recent Cycads than with Ferns. 
Before considering our new material in detail, it will be well 
to review the descriptions of previous writers and note the 
arguments advanced in support of the different opinions as to 
the relation of Myeloxylon to recent plants. 
1 I use this name because it has been adopted by Solms-Laubach in his 
‘ Einleitung in die Palaophytologie,’ as better known than the generic name of 
Stenzelia , although the latter has ten years’ priority according to Goeppert and 
Stenzel (Die Medulloseae, p. io [Palaeontographica, vol. XXVIII. 1881]). 
[Annals of Botany, Vol. VII. No. XXV. March, 1893.] 
B 
