Vol. 58. ] OF FOSSIL PLANTS FROM NEW SOUTH WALES. 3 
essential characters of the species have been fully described by 
Feistmantel,* so that further description is unnecessary here. 
Thinnfeldia odontopteroides is abundant in certain beds in 
Australia and Tasmania, and occurs also in India in the Lower 
Gondwanas, and in beds of Rhetic age in South America 
(Argentine Republic).? In New South Wales it is not known at 
a lower horizon than the Hawkesbury Beds. 
McCoy ’ also describes, but does not figure, a new type from the 
same locality, under the name of Odontopteris microphylla. Noplant 
in the collection bears this name; but two specimens (Nos. 16 & 17), 
without indication as to locality, are certainly those referred to by 
McCoy. The rock in each case is precisely similar to specimens 
labelled ‘ Clarke’s Hill,’ and the specimens themselves agree in 
every respect with the specific characters given under Odontopteris 
mecrophylla, McCoy. 
These plants are neither more nor less than other forms of 
Thinnfeldia odontopteroides (Morris), a plant which varied extremely 
in habit. Specimen No. 16 is easily recognizable as the form of 
this plant figured by Feistmantel in his later memoir, pl. xxvi, 
fig. 1; while the other closely corresponds to that in pl. xxiii, fig. 1. 
Odontopteroides microphylla, McCoy, is therefore a synonym of 
Thinnfeldia odontopteroides (Morris). It is somewhat strange that 
this identity was not suspected by Feistmantel; but this is probably 
due to the fact that no figure of McCoy’s species has ever appeared. 
II. Precoprrris, Brongniart, 1822. 
‘Sur la Class. des Végét. foss.” Mém. Mus. Hist. Nat. [ Paris] vol. viii, p. 233. 
PecopTeris (?) TENUIFOLIA, McCoy. 
Ty pe.—Woodwardian Mus. Camb., Foreign Plant Coll. No. 15 (figured). 
Locality.—Clarke’s Hill, near Cobbity. 
Pecopteris (?) tenuifolia. 
1847. McCoy (47) p. 152 & pl. 1x, fig. 6. 
1878. Feistmantel (78) p. 89. 
1883. Tenison-Woods (83) p. 110. 
1890. Feistmantel (90) p. 111. 
McCoy’s type is the only specimen known, and is unfortunately 
very badly preserved. It consists of a slender axis about 33 inches 
long, bearing narrow linear, distant, lateral members (? inch or 
more long) apparently united by their entire base. It would not 
seem possible to identify this specimen with any of the later dis- 
coveries of fossil plants in New South Wales with which I am 
acquainted, and for the present, in the absence of further and 
better-preserved specimens, it is best relegated to the class ‘ incerte 
sedis.’ 
1 Feistmantel (90) p. 102. 
2 Szajnocha (88) p. 229. 
3 McCoy (47) p. 147. 
BQ 
