mm. The regularity of the leaf-scar arrangement is interrupted at

intervals by the occurrence of more or less regular verticils of scars marking the position of deciduous shoots. Grand’Eury[543] has figured cones which he believes to be those of this species, and Zeiller refers the large strobili, _Sigillariostrobus major_, to _Sigillaria Brardi_[544].

The subterranean axes were characterised by spirally disposed rootlet-scars like those of _Stigmaria ficoides_ (figs. 204, 205) and by a cortical surface with the features of _Stigmaria rimosa_ Gold.[545]

The anatomy of the stele and leaves has already been described (p. 219). The stele of the Stigmarian portion of the plant consists of a band of centripetal primary xylem and a cylinder of centrifugally formed secondary wood with medullary rays containing vascular bundles passing out to the rootlets[546].

_Sigillaria Brardi_ occurs not uncommonly in Permian rocks; it is recorded from France[547], Germany[548], Pennsylvania[549], and elsewhere. It is found in the Upper, Middle, and Lower Coal-Measures of England[550] and in Permo-Carboniferous strata in Africa[551] and Brazil[552].