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v 
FOSSIL PLANTS. 
449 
Syringodendron cyclostigma, Brgt. 
Ilist. Yog. Foss, p. 480, PL 160, fig. 2 and 3. 
Found at Alton, by Mr. H. A. Green. 
Genus SIGILLARIOIDES, Lesqx. 
Cylindrical roots or stems ? variable in size, marked on the 
surface either by round scars, without trace of a central vascu¬ 
lar point, placed in a regular quincunxial or spiral order, or 
by defined Sigillarioid cicatrices with a central vascular point, 
without any regular order of position in relation to each other. 
To this genus are referable the remains of what I consider as 
roots of Sigillaria. 
Sigillarioides radicans, Sp. nov. 
PI. xxxi, fig. 4. 
Primary axis cylindrical, about one inch broad, irregularly 
inflated and strangulated towards the narrower base, bearing 
long tubular rootlets or leaves attached to rhomboidal cica¬ 
trices, which are narrowed on both acute sides, and marked in 
the middle by a broad vascular point; leaves or rootlets more 
than one line broad, marked in the middle by a vascular line 
or medial nerve. The scars are tolerably distant, and without 
any regularity of position relatively to each other. Though 
slightly variable in their form, they are so remarkably similar 
to those of Sigillaria monostigma, that the intimate relation 
of these remains cannot well be doubted. This specimen is 
interesting, especially as seemingly indicating a similarity of 
scars between some species of trees of the Coal Measures and 
their roots. 
Mazon creek; in clay iron-stone nodules. 
—57 
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