ORGANIZATION OF THE FOSSIL PLANTS OF THE COAL-MEASURES. 899 
Specimen G. 
; Column LV. 
Column IT. Column III 
Column I. ° eh A Number of vascular 
Number of internode. bas utate ey . ee ase ee bundles in circumference 
of internode. 
10 40 ceutims. 92 centims. 33 
9 34 3 9°5 4% 34 
8 3:0 , 9:0 5 28 
7 21 55 9:0 i 23 
6 16 43 86 4 19 
5 13 45 81 . 18 
4 0°85 centim. 8:0 a 18 
3 065, 73 8 about 14 
2 0°60 ” 65 ” ” 12 
1 0:50 is 48 ” » 10, 
Basal portion without but indistinct 
distinct bundles, but 
probably too large 
for protomedulla 
See Photograph G, Plate 86. 
THe Roots of CALAMITES. 
When we began writing the present paper we did not expect to be able to throw 
any light on the structure of the root of Calamites. Specimens showing the roots 
in connection with the stems, and having at the same time the internal structure 
preserved, were not yet known to us. Consequently it was impossible to determine 
which, if any, of the petrified remains were to be assigned, as roots, to the Calamitean 
stems. 
One of us, however (D. H. Scorr) has recently had the opportunity, through the 
kindness of M. Renavtr, of examining certain specimens in his collection, which 
place the question in quite a different light. Two of these specimens show an axis, with 
the structure of Astromyelon, in actual continuity with the stem of an Arthropitoid 
Calamite, identical with such as we have described in this paper. Hence the opinion 
which M. Renavtt first expressed in 1885,* is confirmed in a most striking manner. 
There can be no doubt, from the evidence of these specimens, that the Astromyelon in 
question is an appendage of the stem of Calamites (Arthropitys of the French authors). 
Whether this appendage is to be regarded as morphologically a voot, is another 
question, but the anatomy renders it highly probable that this is its true nature. 
Yet another question remained ; are the English specimens on which the genus 
* “ Nouvelles Recherches sur le genre Astromyelon,” ° Mém. de la Soc. des Sci. Nat. de Sadne et Loire,’ 
1885. 
