Masleu . — The Relation of Root to Stem in Catamites. 65 
not narrow but broad. In our specimen the wood also is preserved, and 
the real area of attachment to the rhizome must have been a small one. 
After leaving the rhizome the pith and wood rapidly dilated. 
Passing to the sections which have been cut from this specimen it is 
unfortunate that the preservation of the tissues is peculiar and not good. 
The hollow pith-cavity has been filled with sand and the inner part of 
the wood has been to a certain extent destroyed. Some of the xylem 
wedges which project into the pith-cavity are however complete, and they 
show their carinal canals quite clearly and sufficient to demonstrate the 
Text-Fig. i. Part of a transverse section ot a stem of Calamites (slide 1095 S) showing one 
of the xylem wedges, c, carinal canal ; x, xylem ; p, peculiar cells. 
fact that the main axis is really a stem of Calamites . The points of the 
xylem wedges are surrounded by peculiar large cells, which, if in their 
natural condition, as they certainly appear to be, are different from those 
of any other Calamite stem with which we are acquainted (Text-Fig. 1). 
In vertical sections these cells are often nearly square in outline. Similar 
cells can be seen forming the pith of the lateral roots \ 
The next series of slides (548-557 S) consists of nine longitudinal 
sections and one transverse one made from a flattened stem found by 
Mr. Lomax in the Halifax Hard Bed. Slide 1783 S appears to have been 
cut from the same block. 
1 E. g. in 1093 S. 
F 
