6 MR. NEWELL ARBER ON THE CLARKE COLLECTION [| Feb. 1902, 
1890. Feistmantel (90) p. 121 & pl. xiii, fig. 1, pl. xvi, figs. 3 & 4, pl. xvii, figs. 1, 3, 4, 
6i(?), 7; pl. xx, fis. 2s 
1890. Zittel, ‘Handbuch der Palaont.’ pt. 11, p. 134 & fig. 108, 
1894. David (94) p. 249. 
1896. Zeiller (96) p- 862 & pl. xvi, figs. 1-4. 
1897. Seward (97) p. 316 & pl. xxi, fies. 1-4a, pl. xxii, fig. 4c, pl. xxiii, fig. 1 
1899. Potonié, ‘ Lehrb. der Pflanzenpal.’ p. 155 & fig. 154, 
1900. Zeiller, ‘ Elém. de Paléobot.’ p. 113 & fig. 86. 
Glossopteris indica. 
1869. Schimper (69) vol. 1, p. 645. 
1881. Feistmantel (81) vol. i, p. 101 & many figs. 
Glossopteris linearis. 
1847. McCoy (47) p. 151 & pl. ix, figs. 5 & 5a. 
1878. Feistmantel (78) p. 91 & figs. 
1883. Tenison- Woods (83) p. 123. 
1890. Feistmantel (90) p. 126. 
Glossopteris angustifolia. 
1828. Brongniart (28)? p. 224 & pl. Ixiu, fig. 1. 
1876. Feistmantel, Journ. As. Soc. Bengal, vol. xlv, pt. 1, p. 374 &' pl. xxi, figs. 2-4. 
1881. Feistmantel ( (81) vol. in, p. 105 & many figs. 
Prof. Zeiller* and Mr. Seward * have both recently figured and 
described the various forms of Gl. Brownana, Brongt. at some length, 
and have proved conclusively that it is practically impossible to 
distinguish specifically between Gil. Browniana, Brongt., Gl. indica, 
Schimp., and Gl. angustifolia, Brongt. McCoy ®* states that both the 
former occur in nearly equal abundance in the Newcastle Beds. 
These authors have also shown that this plant is heterophyllous. 
In addition to the better-known fronds, smaller scale-leaves without 
a midrib occur. These are represented by a specimen (No. 65) in 
this collection, and will be mentioned more fully in relation to 
Vertebraria. 
(Glossopteris linearis, McCoy) Specimens Nos. 4 & 63.— 
McCoy * described a new form of Glossopteris, with long, narrow, 
almost parallel-sided jo and an oblique nervation, under the 
name of Gil. linearis. A specimen (No. 4) from Woollongong, New- 
castle Beds, was figured on pl. ix, figs. 5 & 5a of his memoir. 
McCoy stated that this plant could only be confounded ‘with 
Gl. angustifolia, Brongt., from the Indian coalfields,’ from which it 
may be distinguished by its finer and more oblique nervation, 
anastomosing up to the margin. A comparison of the type-specimen 
with the figures given of G1. angustifolia by Feistmantel in his ‘ Lower 
Gondwana Flora,’ fails to show satisfactory evidence for separating 
these two plants. Feistmantel* has there figured side by side two 
specimens: one (pl. xxxiva, fig. 3) a typical Gl. angustifolia, and 
another (pl. xxxiv a, fig. 2) which he says is probably Gl. angusti- 
folia, but does not finally identify it, 
‘as it combines with the size and shape of the leaves of Glossopteris 
angustifolia a venation somewhat abnormal, and different from that of the 
latter species.’ 
1 Zeiller (96)*, 2 Seward (97). 
> McCoy (47) p. 150. 4 McOoy (47) p. 151. 
° Feistmantel (81) vol. iii, p. 105 & pl. xxviia, pl. xxxiva, fig. 3, pl. xxxix a, 
figs. 1 & 2. 
