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at base, somewhat falciform; apex generally more rounded 
than the terminations of lateral pinne ; neuration parallel 
and crowded at contracted or petiolate attachment, 
thence gently spreading and forking, the lateral nerves, 
terminating in dentate or curiously recurved and variable 
laciniate segments, which are more strikingly developed 
at base of lateral pinne; the central nerves reach 
the extreme termination of pinne; nerves form a somewhat 
coarse linear grooving on surface of pinne, but do not 
anastamose. Not uncommon in shaly beds at Spring Hill, 
Tasmania. 
I have placed this singularly handsome form under the 
genus Rhacopteris, although the form of its neuration is very 
suggestive of alliance with certain forms of Otozamites. 
See O. imbricatus, Feistm. The rhachis, though strong 
and rigid, with a broad shallow groove on one side, lacks 
the prominent mesial angle which characterises R. inter- 
media, Feistm, and the more closely related R. septentrionalis, 
Feistm. It almost invariably happens also that, unlike 
the latter, the most pronounced recurved segment is 
the lower one of any marginal group; the segments are 
smaller and finer as a rule towards the apex of each pinna 
where they usually are simply dentate. It is here again 
noteworthy that the European members of this singular genus 
is confined to the Devonian and Lower Carboniferous rocks, 
a fact which should not be overlooked in attempts made to 
correlate the widely separate groups of Upper Pal. and 
Mesozoic rocks of Australasia, 
R. In#QuiLaTERA (Goeppert). 
Frond upper side broadly rounded, truncate at the base 
at aright angle. Petiole, short, straight, decurrent. Veins 
united at the base, spreading widely and dichotomously 
divided. 
Localities —TASMANIA —(Not known. See &. Fetstmantelii). 
N.S. Wares-—Arowa, Smith’s Creek. 
References.—Goeppert (Cyclopteris), Flora, A. Silur-Devon., p. 
72, Vol. XXXVIL., pp. 6, 7, and 8; Tenison-Woods, Proc. Lin. 
Soc., N. S. Wales, 1883, Vol. VIIL, pt. 1., p. 98 ; Feistmantel, Foss, 
Flora. of E. Austral. and Tasmania, Geol. Mag., Nov., 1879, p. 489. 
R. usTERMEDIA (Feistmantel). 
Rhachis thick, with a prominent mesial angle, pinnules 
alternate, pedunculate, oblong, rhomboid, incised into cuneate 
segments, the centre longest, incisions scarcely marked above. 
Margins of the segments denticulate, veins numerous, forking, 
radiating in the segments. In the form of the rhachis this 
resembles very much R&. transitionis and R. machanechi, Stur. 
Localities —TasManta—(Not known, See &. Leistmanteliz). 
N.S. WaLes—Port Stephens (Stroud). 
