480 PROFESSOR HEER ON THE EOSSIL FLORA OE NORTH GREENLAND. 
60. M c ClintocMa trinervis , Hr., Plates LII. fig. 8 a; L. 12. Hr. FI. Arct. p. 115, 
pi. xv. figs. 7-13. Hab. Atanekerdluk, with Populus arctica (fig. 8 b) and Hedera 
M c Clurii (fig. 8, c). 
A very long, narrow leaf, the upper portion toothed, the lower entire. The teeth 
large and strongly bent towards the apex. The reticulation between the primary nerves 
is very well preserved. Plate L. fig. 12 is a fine small leaf, like Cocculus laurifolius , 
Colebr., but the upper portion is toothed. 
XXVIII. Steeculiace^e ?. 
61. Pterospermites spectabilis, Hr., Plates XLIII. fig. 15 b ; LIII. 1-4. Foliis amplis, 
basi leviter emarginatis, cordato- vel ovato-ellipticis integerrimis, nervis secundariis. 
infimis debilibus, sequentibus duobus inferioribus oppositis, validis, nervis tertiariis 
longis ornatis. Hab. Atanekerdluk, not rare. 
Plate LIII. fig. 1 is a very large leaf with strong nerves. The first pair of secondaries 
delicate, and they spring at an obtuse angle ; the next two are opposite, very strong, and 
spring at a right angle ; their tertiaries are strong and forked. The succeeding nerves 
are alternate, and send out tertiaries. The areas are filled with continuous, sometimes 
forking nervules. A similar leaf is figured at Plate LIII. fig. 3. Plate LIII. fig. 2 and 
Plate XLIII. fig. 15 b are much smaller. One part of the latter leaf is perfectly pre- 
served ; it is ovate and tapered at the end, and the strong secondary nerves spring at an 
acute angle. This is also the case in Plate LIII. fig. 4 a, which has only one small 
basal secondary nerve. Beside these is a leaf of Populus arctica (fig. 4 b) and the 
remains of a very large Platanus. 
We can thus distinguish several forms of this species, viz. : — 
(a) Leaves very large ; strong secondary nerves springing at a right angle, with several 
basal small secondary nerves (Plate LIII. figs. 1-3). 
(b) Leaves smaller, strong secondary nerves springing at an acute angle, with several 
basal small secondary nerves (Plate XLIII. fig. 15 b). 
( c ) Leaf large, strong secondary nerves springing at acute angles, with only one basal 
small secondary nerve (Plate LIII. fig. 4 a). 
Differs from P. integrifolius , Hr., in the leaf not being peltate at the base. 
62. Pterospermites alternans , Hr., Plate LIV. fig. 3. Foliis amplis, basi rotundatis, 
subemarginatis, integerrimis, margine glandulosis (1), nervis secundariis infimis debi- 
libus, sequentibus alternis approximate, validis, extrorsum ramosis, angulo acuto 
egredientibus. 
This and the large leaf figured in my 4 Flora Arctica ’ (pi. xlix. fig. 8) belong to the 
same species. It differs from Pt. spectabilis in the first strong secondary nerves, which 
are not opposite ; and from Ficus Gronlandica in the not palmate primary, and in the 
strong secondary nerves. 
