53 
to 4 mm. to 6 mm. in width at greatest breadth, more or less lanceolate, gradually 
tapering to an obtuse bluntly rounded apex. Veins parallel, 5 or more in each 
pinnule near the base, occasionally forking. 
Description of the Specimens. —Two specimens from Mataura Falls are figured. 
Fig. 1 (natural size), Plate XII, shows the general habit, and fig. 2, Plate XVIII, 
is an enlarged photograph of another specimen, showing the bases of the pinnules 
and their nervation. Hector’s figure (see above) is quite inaccurate as regards the 
apical characters of the leaflets, which are shown as if they were extremely acute, 
whereas in reality they are bluntly rounded. 
Remarks. —Hector’s plant is, I believe, a distinct type, not previously described. 
Its nearest affinities appear to be Pterophyllum Sandbergeri Schenk(l), from the Keuper 
of Raibl, Austria, and P. Munsteri Schenk(2), from the Rhsetic of Germany. There 
are, of course, many other species from Rheetic or Jurassic beds in various parts 
of the world with which more remote comparisons might be instituted. 
Type. —-New Zealand Geological Survey collection. 
Occurrence.—Mataura Falls, Southland (Middle Jurassic). 
Genus PTILOPHYLLUM Morris, 1840. 
(Trans. Geol. Soc., ser. 2, vol. v, p. 327.) 
1. Ptilophyllum acutifolium Morris. Plate XI, figs. 1, 2, 5. 
1840. Ptilophyllum acutifolium Morris, Trans. Geol. Soc., ser. 2, vol. v, p. 327, pi. xxi, 
figs. 1-3. 
1841. Ptilophyllum acutifolium Morris, Ann. <0 Mag. Nat. Hist., vol. vii, p. 117. 
1850. Zamia Theobaldii McClelland, Rep. Geol. Surv. India, for 1848-49, p. 52, pi. xii, figs. 1, 2. 
1863. Palceozamia acutifolium Oldham and Morris, Foss. Flora Gondwana Syst. (Pal. Indira), 
vol. i, pt. i, jn 29, pi. xx, figs. 1, 2; pi. xxi, fig. 2. 
1863. Palceozamia acutifolium var. conferta Oldham and Morris, ibid., p. 29, pi. xx, fig. 3. 
1867. Palceozamia acutifolium Blandford, Mem. Geol. Surv. India, vol. vi, pp. 9, 16. 
1870-72. Ptilophyllum acutifolium Scnimper, Traite Pal. Veget., vol. ii, p. 166. 
1872. Palceozamia acutifolia Wynne, Mem. Geol. Surv. India, vol. ix, p. 173. 
1876. Ptilophyllum acutifolium Feistmantel, Foss. Flora Gondwana Syst. (Pal. Indica), vol. ii, 
pt. i, p. 44, pi. v, figs. 4, 4a. 
1877. Ptilophyllum (Palceozamia) acutifolium Feistmantel, Palceontogr., Suppl. iii, Lief, iii, 
p. 11, pi. i; pi. ii; pi. iii, figs. 1, 2. 
1877. Ptilophyllum acutifolium Feistmantel, Foss. Flora Gondwana Syst. (Pal. Indica), vol. i, 
pt. ii, pp. 65-117, pi. xl. 
1877. Ptilophyllum acutifolium Feistmantel, ibid., vol. i, pt. iii, pp. 178-216, pi. ii, 
figs. 1, 2, 4. 
1877. Ptilophyllum acutifolium Feistmantel, ibid. , vol. ii, pt. ii, pp. 94-114; pi. v^ pi. vi, fig. 2 
1879. Ptilophyllum. acutifolium Feistmantel. ibid., vol. i, pt. iv., pp. 23-213, pi. x, figs. 1-3, 
7-9; pi. xi, fig. 1 ; pi. xv, figs. 12, 13; pi. xvi, fig. 14. 
1913. Ptilophyllum acutifolium Halle, K. svenska Vet.-Akad. Handl., vol. li, No. 3, p. 34, 
pi. iii, figs. 1-12. 
Diagnosis. —Leaf pinnate, elongat.ely lanceolate, exceeding 15 cm. in length and 
1-5 cm. in breadth. Pinnules 1-4 cm. in length, and 3 mm. across at the base, 
approximated, alternate, elongately lanceolate, broadest at the base, straight or more 
usually falcate, apex acuminate, base unsymmetrical, upper margin auriculate, rounded, 
lower margin straight. Nerves about 5, arising from the rachis, and usually forking 
once, subparallel, radiating from the base. 
Description of the Specimens. —The specimen seen on Plate XI, fig. 5, natural size, 
shows several fragments of these leaves. A single leaf occurring on the back of the 
(1) Schenk (1866), p. 17, pi. i, fig. 9. 
(2) Schenk (1867), p. 167, pi. xxxix, figs. 1-3. 
