OF THE FOSSIL PLANTS OF THE COAL-MEASURES. 
I6d 
Pages on wh ich 
1 Plate. 
Fig. 
references ai-e 
made to the 
figures. 
tissue c of figs. 1 and 2 ; g, carbonised cortical paren¬ 
chyma. Cabinet number, 1818. X 7 . . ., . 
157 
1 
5 
A small detached vascular axis having’ the appearance 
1 
of being' metamorphosed into a structure like the axis 
h of fig. 1 ; a, its incipient medullary centre, with 
traces of four radiations, like the five a, a, of 
fig. 1. X 11 . 
157 
2 
5a 
A transverse section of a cylindrical appendage, like 
fig. 3, e, but in the centre of the vascular axis, e, is a 
point from whence radiate three lines apparently 
identical wdth the five, a, a, of fig. 1. Cabinet 
number, 1830. X67 . 
157 
2 
6 
Transverse section of a petiole of Zygog)teris Lacattii : 
j 
i 
y, y, its division into two secondary petioles ; a , cen¬ 
tral vascular bundle of the petiole; a, a , secondary 
vascular bundles supplying the two branches, y, y ; 
a," a" , vascular bundles destined for ternary branches 
or pinnules. Inner cortical layer with gum canals, h . 
Cabinet number, 1181. X2 . 
i 
i 
159 
1 
2 
7 
Slightly oblique section through the central or vas- 
culo-medullary axis of Colamostacliy?, Binneyana : a, 
medullary parenchyma ; 6, 6, a few peripheral barred 
vessels : h,' h', clusters at each of the four angles 
! 
containing large numbersof barred vessels or tracheids. 
Cabinet number, 1004. Xl5 . 
160 
2 
8 
A transverse section of strobilus of Calamostachys Bin- 
neyana : a, central or vasculo-medullary axis; 
li, coarse outer cortex; v , fertile sporangiophores ; 
V, enlarged shield-like extremities of these sporan¬ 
giophores ; v ," V," accumulations of tracheids within 
the peripheral margins of these shield-like expan¬ 
sions and near the points at which the sporangia, ic , 
are united to the sporangiophores ; g ', g,' tranverse 
sections of tlie sterile bracts forming the next inferior 
verticil of these organs; g' , g', sections of the upper 
