162 THE rOTOMAO OR YOUNGER MESOZOIC FLORA. 



uated towards the summit, and dissolving into branches near the tips; 

 lateral nerves of the basal toothed pinnules or lobes composed of a nerve- 

 bundle which goes off very obliquely from the lower portion of the lobe 

 or below it, branching several times, curving strongly away from the 

 midnerve of the pinnule or reduced pinna, slightly diverging, the ultimate 

 branches going into the teeth, and mostly simple. In the lobes towards the 

 upper end of the pinnules the nerves become less and less copiously 

 branched, being finally reduced to nerves forking only once or twice. 



Localit)^ : Fredericksburg ; rather rare. 



This plant must have been a very large one. Plate LXI, Fig. 7, and 

 PL LXIV, Fig. 2, give probably fragments of compound pinna-. The 

 pinnules cut into lobes are most probably reduced ultimate pinna', tbe 

 lobes representing what are, in portions lower down, pinnules separate to 

 the base; possibly these fossils may be a variety of the next following, 

 Zamiopsis insir/nis, but there seem to be no forms establishing a ^xissage 

 into that species. 



Zamiopsis insignis, sp. nov. 



Plate LXII, Fig. 3; PLate LXIV, Figs. 1, 3; Plate LXV, Figs. 4-6; Plate LXVI, Fig. 2; Plato 



LXVII, Fig. 7. 



Frond very large and spreading, ])robably tripinnate; leaf-substance 

 of the pinnules thick and leathery; epidermis, covering the principal rachis, 

 as well as the other portions of the plant, thick and durable ; principal 

 pinn;^ going off at very nearly a right angle, very long, with a very stout, 

 rigid rachis, keeled on the lower side, with marginal ridges on the upper 

 side. The ultimate reduced pinnae or pinnules pass towards the summit of 

 the penultimate pinnaj into much reduced toothed pinnules, united at base 

 and decurrent; ultimate pinnte or pinnules oblong, nuich narrowed at base 

 in the lower ones, and attached by the middle of the base, alternate, vary-' 

 ing in size, extent of toothing, and remoteness with tlieir position on the 

 frond, lower ones cut deeply and obliquely into oblong or subquadrangu- 

 lar lobes or pinnules, which usually have near the tips on each side shal- 

 low spinous teeth, and end in a comparatively large ovate-acute tooth. 

 Sometimes only one tooth is found on the lobes, and that occurs on the 



