49 
specimens. On account of the slight difference in the shape of the pinnules, and 
especially in view of the fragmentary nature of the New Zealand fossil, T have been 
content simply to compare it with that described from Argentina. 
Occurrence. —Clent Hills (Rhaetic). 
2. Thinnfeldia Feistmanteli ? (Gothan). Plate V, fig. 4. 
1890. Thinnfeldia odontopteroides (pars) Feistmantel, Mem. Geol. Surv. N.S. Wales, Pal. 
No. 3, p. 101, pi. xxv. 
1912. Dicroidium Feistmanteli Gothan, Abhandl. Naturhist. Gesellsch. Niirnberg, vol. xix, 
p. 78, pi. xvi, fig. 1. 
1913. Dicroidium Feistmanteli Antevs, K. svensJca Vet.-Akad. Handl., vol. lii. No. 5, p. 1, 
pi. i, figs. 1-7. 
1914. Dicroidium Feistmanteli Antevs, ibid., vol. li, No. 6, p. 52, pi. 1, figs. 5, 6; pi. 5, fig. 1. 
Diagnosis. Frond bipinnate above, dichotomous below ; primary rachis stout; pinnae 
lanceolate; pinnules large, unsymmetrically oval, approximated, confluent at the base 
especially towards the apex of the pinna. Nerves radiating from the base with 
frequent dichotomy. 
Description of the Specimen. —Two pinnae attached to a rachis are seen on Plate V, 
fig. 4, twice enlarged to show the nervation. The rachis is comparatively slender. 
The pinnae measure 4 cm. or more in length, and the pinnules are unsymmetrically 
oval, and more or less united. There is no distinct midrib, the nerves all arising 
directly from the rachis and dichotomizing freely. 
Remarks. Gothan has recently distinguished one of the Australian specimens, 
assigned by Feistmantel in 1890 to Thinnfeldia odontopteroides (Morr.), as a new species, 
Dicroidium Feistmanteli sp. This type is bipinnate above, and the pinnules are 
broader than in the ordinary forms of T. odontopteroides. It is difficult to decide 
whether it is really worthy of generic distinction or not, but, on the whole, I am 
inclined to accept T. Feistmanteli as a distinct species. In the present specimen the 
pinnules are thinner and less leathery than is usually the case in T. odontopteroides, but 
the rachis is much more slender than in the type specimen of T. Feistmanteli, and the 
pinnules are at the same time much smaller. I therefore regard the specific assign¬ 
ment of the New Zealand plant as somewhat doubtful. 
Occurrence .—Owaka Creek, Catlin’s River (? Rhaetic) ; Curio Bay, Waikawa (Middle 
Jurassic). 
3. Thinnfeldia lancifolia (Morris). Plate V, figs. 1, 2, (?) 6. 
1845. Pecopteris odontopteroides var. lancifolia Morris, in Strzelecld, Phys. Descr. N.S. Wales, 
p. 249, pi. vi, fig. 4. 
1888. Thinnfeldia lancifolia Szajnocha, Sitzungsb. k. Akad. Wissen., Wien (Math.-Nat. Cl.), 
vol. xcvii, p. 231, pi. i, figs. 46, 5, 6, 7. 
1909. Thinnfeldia lancifolia Dun, Rec. Geol. Surv. N.S. Wales, vol. viii, pt. iv, p. 31(3. 
1912. Dicroidium lancifolia Gothan, Abhandl. naturhist. Gesell. Niirnberg, vol. xix, p. 78, 
pi. xvi, figs. 2-4. 
1913. Thinnfeldia lancifolia Arber, Proc. Roy. Soc. London, ser. B, vol. lxxxvi, p. 346, 
pi. viii, fig. 7. 
1914. Dicroidium lancifolium Antevs, K. svenska Vet.-Akad. Handl., vol. li, No. 6, p. 58, 
pi. v, figs. 6, 7. 
Diagnosis .—Habit as in T. odontopteroides (Morr.), ( q.v .), but pinnules are elongate, 
bluntly lanceolate, decurrent, with a distinct midrib. The lateral nerves arise in part 
from the midrib, in part direct from the rachis, usually dichotomizing once, sometimes 
twice. Differs from T. indica Feistrn. in the pinnules being neither contracted at the 
base nor acute at the apex. 
4 — Mes. Floras. 
