xlii

tions, branched. Leaves verticillate, linear, acute,with a single midrib, quite distinct at their base,(bruit a one seeded ? ovate, compressed nucule,bordered by a membranous wing, and emarginateat the apex. Ad. Hr.)

Twelve species—in the Coal formation.

One species—in the transition beds.

Obs. This is probably an extremely heterogeneous assem-blage, comprehending nearly all fossils with narrow- veinlessverticillate leaves, that are not united in a cup at their base.

Genus 34. Hechera. Stem branched, jointed, tumid at thearticulations, deeply and widely furrowed. Leavesverticillate, very narrow, acute, ribless ?

One species—in the Coal formation.

Subclass 2. ENDOGENiE; or MONOCOTYLEDONS.Maeantaceje.

Genus 35. Cannophyllites. Leaves simple, entire, traversedby a very strong midrib ; veins oblique simple,parallel, all of equal size. Ad. Hr.

One species—in a bed of coal, supposed to be morerecent than the old coal formation.

AsPllO-DELJi.E.

j Stems only known.

? Genus 36. Huchlandia. Stem covered by reticulated fibres,giving rise to (imbricated) leaves which are notamplexicaul, and the petioles of which are dis-tinct to their base. Ad. Hr.

One species—in Stonesfield slate.

Obs. Dr. Buckland suggests the possibility of this beingthe amentum of a Cycadeous plant. O. tram. vol. 2. n.p. 400.

Genus 37.

Clathraria. Stem composed of an axis, the sur-face of which is covered by reticulated fibres,and of a bark formed by the complete union ofthe bases of petioles, whose insertion is rhomboidal. Ad. Hr.

One species — in the Green sand ?