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mid-rib well marked; lateral veins numerous and very delicate, 
sub-parallel, almost horizontal near mid-rib, the most prominent 
becoming very indistinct and curving upwards at junction 
with intra-marginal vein, the least prominent usually anas- 
tomising before reaching the same vein; intra-marginal 
vein delicate, wavy, following moderately close to the edge. 
This form is easily distinguished by its most delicate, close, 
and almost horizontal veins, and by its extremely acuminate 
apex. Named in honour of Mr, Kayser, the discoverer of 
many new fossil leaf forms at Mount Bischoff. Found in 
Tertiary Sandstones, underlying basalt, Mount Bischoff. 
Laurus Sprentii, ns. Fig. 1. 
Leaf coriaceous, rigid, oblong, about 7 inches long. and 2 
inches wide below the middle ; base imperfect, but evidently 
acutely tapering ; apex somewhat mucronate ; margin simple, 
very slightly and irregularly undulating; mid-rib strong; 
lateral ribs (eight pairs), somewhat thick near mid-rib, first 
three sub-equal, upper pairs lessening; lateral ribs 
emerge at an angle of 70 to 80 degrees, gradually be- 
coming extremely fine as they gently curve upwards and out- 
wards towards margin, into which they run at a very acute 
-angle ; tertiary veins inconspicuous. From base to Ist 
secondary vein, 25 mil.; Ist to 2nd, 16 mil.; 2nd to 3rd, 
25 mil.; 3rd to 4th, 19 mil; 4th to 5th, 13 mil.; 5th to 6th, 
12 mil.; 6th to 7th, 14 mil.; 7th to 8th, 10 mil. Nervules 
very indistinct, evidently forming a fine oblong reticulation 
transverse to secondary veins. 
Cycadites microphylla, n.s. Fig. 8. 
Leaf imperfect, simply pinnate ; pinnee, with scarcely visible 
mid-rib, very minute, flat,linear-subulate, inserted obliquely 
on the margin of rhacis, at an angle of about 25 degrees, 
contracted at the base, faleate obtuse or pungent pointed, 
about 12 millimetres long, and 2 broad at base, 
Quercus Bischoffensis, u.s. Fig. 5 6. 
Leaf ovate-acuminate,; mid-rib and secondary nerves 
valid, raised, the latter (about 14 pairs) regular, simple, 
emerging from mid-rib at an angle of from 45 to 50 degrees, 
and scarcely curved as they proceed directly upwards and 
outwards to margin, where each nerve terminates in the 
sinus or apex of a minute serrature; margin minutely and 
somewhat irregularly serrated, from two to four serratures 
between the extremities of secondary nerves. Mature 
specimens about 55in. long and 2in. broad. 
This handsome form occurs in the greatest abundance in 
tertiary sandstone of Mount Bischoff. It is distinguished 
from Q. drymejoides, Httingshausen, which it resembles in 
