IN THE MANCHESTER MUSEUM. t 



Stigmaria ficoides, Brongniart, 1822. 



1822. stigmaria ficoides, Brongniart, Class, de Veget. Fossiles, p. 9. 



1848. „ ,, Hooker, "On Some Peculiarities in the Structure 



of Stigmaria," Mem. Geol. Surv. ii., pt. 2, p. 431, 



pi. i., figs. I and 2. 

 1887. „ „ Williamson, Monogr. Stig. ficoides, Palaeont. Soc, 



p. 45, pi. XV., fig. 80, cuts 7 and 8. 



Original of Hooker's Figures. — Fragment of un- 

 compressed Stigmarian root, showing a series of deep pits 

 or cavities in which the roots originated. 



Peel Quarry, Lanes. 



Millstone Grit. Donor, Mr. Ormerod. 



Specimen of Stigmaria ficoides, from the Lower Coal Measures, Clayton, 



near Bradford. Height of stump, 3 ft. 9 in. ; diameter, 4ft. 4 in. ; 



length of roots, 8 ft. 6 in. to 17 feet ; diameter close to stump, 16 to 21 



inches. (From a photograph.) 



Original of Williamson's Figures. — A huge speci- 

 men of Stigmaria ficoides, showing the division into four 

 primary roots at the base of the trunk, and the formation 

 of secondary roots by a regular bifurcation. The specimen, 

 as at present mounted, covers an area of 360 square feet. 

 The trunk, having a diameter of 4 ft. 4 in., is preserved to 

 a height of about four feet. 



Clayton, Bradford, Yorkshire. 



Millstone Grit. Donors, Professor Williamson and Friends. 



