18 PROCEEDINGS OF THE ACADEMY OF [Jan., 



at intervals of 11 to 13 mm. by the contracted base. Form of leaflets 

 linear, parallel-sided, with the margin thickened and reflexed and 

 the apex obtuse and rounded, rather suddenly contracted at the base 

 where they are attached to the rachis. The length of the leaflets is 

 about 90 mm., width 10 to 11 mm. They are deciduous, leaving an 

 elongated scar measuring 3 mm. longitudinally by 1 mm. transversely 

 on the rachis when they fall; the middle of the scar is marked by a 

 circular spot where the vessels emerge. Fragments of the bare rachis 

 occur marked with the leaf scars and the individual detached leaflets 

 are found on some slabs. The leaflets are strongly parallel nerved, 

 the nerves radiating from the point of attachment to the rachis and 

 branching dichotomously until beyond the contracted base of the 

 leaflet, from which point they are simple and par ailed to the end. 

 Those leaflets towards the basal end of the rachis are variously split 

 at the ends along the veins, or the ends of the leaflets are variously 

 divided into two or three lobes with rounded ends and parallel 

 margins, probably due to erosion or perhaps to cutting by insects. 

 The leaflets must have been rather thick, for they leave behind a 

 distinct coaly film, and in some cases the rachis impression shows a 

 still heavier film of coal. Owing to the linear form of the leaflet and 

 the obtuse apex, there seems to be no contraction of the nerves at 

 this point. 



Zamites velderi sp. nov. Plate II. 



Rachis slender, about 1.5 mm. in diameter, having about 30 leaflets 

 on each side in a length of 150 mm. Leaflets alternate to sub-opposite, 

 sessile; nearly touching at their bases; inserted on the upper side of 

 the rachis by the contracted base, which expands abruptly from the 

 point of attachment to somewhat more than the normal average width 

 of the leaflet, making the base slightly eared; the leaflets point out- 

 ward and forward from the rachis at an angle of 65°. Form of the 

 leaflets linear, parallel margined above the expanded base, and rounded 

 and obtuse at the apex; length 40 to 50 mm., becoming shorter 

 towards the base of the rachis ; width 3.5 to 4.5 mm. ; the edges of the 

 leaflet reflexed and thickened. The leaflets are parallel-nerved, the 

 nerves radiating from the point of attachment to the rachis, but their 

 mode of forking is not well preserved and does not appear to be 

 dichotomous; nerves fine, about six in 1 mm. 



The attachment of the leaflets is at the upper side of the rachis, by a 

 sharply contracted base, and the expanded, eared bases overlap the 

 rachis somewhat, as well as being in contact with each other, but there 

 is no evidence on the one specimen of this species that the leaflets are 



