Notes . 
169 
peltate lamina, on which two pendulous sporangia were borne. In the bi-sporangiate 
character of the sporangiophores and in other details of structure, Sphenophyllum 
fertile approaches the Boivmanites Romeri of Count Solms-Laubach, while in the 
form and segmentation of the sporophylls there is a considerable resemblance to 
the Lower Carboniferous genus Cheirostrohus. 
The wall of the sporangium has a rather complex structure, the most interesting 
feature in which is the well-defined small-celled stomium, marking the line of 
longitudinal dehiscence. 
The spores, so far as observed, are all of one kind ; they are ellipsoidal in 
form, with longitudinal crests or ridges; their dimensions are 90-96 ju, in length 
by 65-70 /a in width. 
The most characteristic point in the structure of the new cone — the fertility 
of both dorsal and ventral lobes of the sporophyll — is regarded as more probably due 
to special modification than to the retention of a primitive condition. 
D. H. SCOTT. 
Kew. 
N 
