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Genus Nothofagus Blume
Nothofagus searellae n. sp. (Pl 27, Figs. 3, 4)
Lanceolate leaf with entire margin, basal angle 150° Length 22.5 mm., width 10 mm. Remnant of petiole 0.75 mm. wide, 0.25 mm. long. Midrib straight and well defined to apex, 0.75 mm. wide at base, 0.1 mm. wide at apex. Venation craspedodromous with seven pairs of alternate secondaries leaving midrib at 50° -60°. Each secondary branching of way to margin into two equal short veins merging into the tertiary reticulation.
Tertiary reticulation a roughly rectangular mesh with mterstices about 0.5 mm. across.
Locality Esk Valley B206/7 Holotype. and Esk Valley localities tabulated below.
Age. Nukumaruan.
Other specimens have the following dimensions:
| Length | Width | Basal Angle | |
| B206/7 | 28 mm | 6 mm | c 150° |
| B215/94 | 24 mm. | 8 mm. | |
| B215/5 | 28 mm. | 10 mm. | |
| B209/10 | 25 mm | 8 mm | |
| B209/30 | 24 mm | 9 mm | |
| B209/25 | 25 mm. | 11 mm. | 120° |
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215/5, 209/10, 209/30 are incomplete at the base, but if symmetrical their basal angles exceed 90°. B206/7 is long and narrow, but B209/25 and /30 are much wider. There are 6 or 7 pairs of alternate veins, all branching in the same way. Tertiary venation is generally not well preserved. The leaves of N. searellac are similar in shape to the group N. solandri-cliffortioides but are distinguished by their larger size and more numerous secondary veins.
This species is named after my wife, who helped considerably in the location and collection of the Esk Valley fossils.
Nothofagus cf. cliffortioides × fusca (Pl. 27, Fig. 5)
Leaf ovate, with rounded apex and tapering base, left half of lamina joining petiole slightly below the right side Margin entire, slightly downcurved.
Lamina 24 mm. long, 13 mm. wide, petiole 3 mm. long, 1 mm. wide, basal angle 75°.
Midrib straight near base, sinuate above, persistent almost to apex. Venation craspedodromous, 8 pairs of alternate and subopposite secondaries leaving midrib at angles varying from 35° at base to 60° nearer apex. Secondaries forking once between ¾ and ⅞ of distance to margin. Tertiary venation of oblong reticulae about 0.3 mm. across.
Locality. Esk Valley B206/2 and /3 (counterparts).
Age Nukumaruan.
This specimen is similar to leaves of hybrids between Nothofagus fusca and cliffortioides, that Kirk named N. blairii (see Cockayne, 1926) N. cliffortioides leaves have been identified from B206 but no N. fusca leaves were found.