E. W. Claypole—Tree-like fossil plant, Glyptodendron. 308 
GLYPTODENDRON. ‘Tree-like; stem cylindrical; surface 
marked with two parallel sets of ridges running spirally up the 
stem in opposite directions, crossing each other and thus forming 
thomboidal areoles. Lower portion of areole depressed and prob- 
ably representing or containing a leaf-scar. Depressed porece 
of areole (leaf-scar?) symmetrical (i. e. alike on the right and 
left sides.) Vascular scars, leaves, fruit, etc., unknown. The 
name is from the Greek yAdga, I engrave, and alludes to the 
depressed areoles. 
Glyptodendron Eatonense. Stem thick and trunk-like; the 
specimen from which this description was made measured when 
complete about six inches in diameter. Surface divided into 
rhomboidal areoles by two sets of narrow ridges parallel and 
- peadaier vag running spirally up the stem in opposite directions. 
ese ridges cross bas other nearly at right angles. The are- 
oles thus formed measure about seven-sixteenths of an inch 
along each diagonal. Lower portion of areole deeply and 
evenly depressed and probably Hi ul a sunken leaf-scar. 
Upper border of depressed portion rounded in outline and ele- 
vated, equalling in height the spiral ridges. No trace of the 
vascular scars can be seen in consequence of the roughness of 
He says, “ The marks on your specimen, at 
rags sight, resemble those of the Lepidodendra of the type of the 
have belonged to a plant of the nature of a Tree-fern, or of a 
Sigillaria allied to ‘s Menardi, rather than to a true Lepidoden- 
