78 
Phyllotheca, Zigno, Flora Format. Oolitliicac, Padova, 1846-56. 
„ Ilcer, Juraflora Ostsibiriens mid dc3 Amurlandes, 1S7G, p. 48. 
„ Foistmantel, Raniganj Flora, (Journ. As. Soc. Bengal, 1876, Yol XLV, p. 810). 
„ Ileer, Nachtrage zur Flora von Irkutsk, p. 4 (Flor. Foss. Arctica, 1878, Yol. Y). 
,, Feistmantel, Palaeoz. und mesoz. Flora von Australlens, 1878, p. 83 (figures). 
„ Sclimalhausen, Beitrage z. Jurafl. Russlands, (Mem. Acad. Imp. Sc. St. Petcrsbourg, 
1S79, 7th Ser., Vol. XXVII, No. 4, 1879, pp. 12, 46, 62). 
„ Feistmantel, Flora of the Damuda and Pancliet Division (Fossil Flora of tlio 
G-ondwana System, 1880, Yol. IIT, pt. 2, pp. 65, &c., and figs). 
„ Tenison Woods, 1883, loc. cit., p. 69. 
,, Zittel, Ilandbuch d. Pal., 1880, II Bd., 2 Lief., p. 162. 
Gen. Char. — Plantis herbaceis ; lmbitu cquisetorum. Caule simplici 
vel ramoso, articulato, sulcato; ramis ipsis articulatis, striatisque. Pol i is 
verticillatis, basi in yaginam connatis, linearibus et linear! lanceolatis, scquali- 
bus, erccte incurvis, costatis. 
Ol>8 . — This genus was first described by Brongniart from the llawkes- 
bury River, New South Wales. Later it was found in Australia more 
abundantly and at various horizons. It was described from the Lower Oolite 
of Italy (Zigno), from the coal beds of India (Raniganj -Kami hi Group), 
from East Siberia (ITeer), from the Altai, and North Siberia, &c. 
The distribution of the various species of Phyllotheca , as far as they 
arc known to me, is the following : — 
(a) Australia. — Phyllotheca australis, M £ Coy; including, probably, 
P. ramosa and P. Hooker i, M £ Coy ; Phyllotheca concinna, T.-W., and P. 
carnosa, T.-W. These will be discussed hereafter. 
The range of this genus in Australia is from Permo-Carboniferous to 
Jurassic. 
(b) India. — Prom here only two species arc known — Phyllotheca 
indica, Bunb., and Phyllotheca robusta , Peistm., from the Raniganj -Ivamthi 
horizon of the Damuda Group. 
(c) Siberia . — There the genus is represented by several species ; they 
arc : — Phyllotheca sibirica, Ileer, was described and figured in 1S7G and 1S7S 
by Prof. Ileer, from Jurassic beds in the Gouvernement Irkutsk (Siberia) ; 
Phyllotheca delinquescens, Gopp., described and illustrated by Prof. Schmal- 
liausen [toe. cit., 1879), from Jurassic beds of the Kusnezk basin in the Altai 
(Siberia), and from the same formation on the lower Tunguska River, North 
