FOSSIL IXORA. 63 



PLATE XXIII. 



"Great Stigmaria." 



{Stigmaria ficoides, of Brongniart. 

 Ficoidites major, of Artis.) 



Thk fossil here represented Is a fragment of a Stigmaria having larger tubercles than the 

 species previously described. The tubercles are oval at the base, somewhat compressed, longi- 

 tudinally farrowed at the top, with a pit in the furrow. 



This root is from five to six inches in diameter ; the axis is seen near the compressed side, 

 in the transverse section at the bottom of the figure. 



From a sandstone quarry, near Rotherham, Yorkshire. 



The specimen figured by Mr. Parkinson, ante, Plate III. fig. 1, appears to be the fragment 

 of a Stigmaria of this kind in ironstone : the internal axis is seen in the transverse section 

 pressed from its natural position to near the outer surface. 



