NOEGGERATHIOrSIS. 181 



1902. Noeggerathiopsis Gocpperti, Arber, Quart. Journ. Geol. Soc, vol. lviii, 



p. 17, pi. i, figs. 1, 2. 

 ? N. Hislopi, Zeiller, Flore Foss. Gites Charb. Tonkin, p. 149, pi. xl, 

 figs. 1-6, ?7-9. 



1903. A'. Hislopi, Seward, Ann. S. African Mus., vol. iv, pt. 1, p. 9G, pi. x, 



fig. 5 ; pi. xiii, figs. 2-4. 

 A 7 ". Hislopi, Kurtz, Quart. Journ. Geol. Soc, vol. lix, p. 25. 



Type. No. It. 10,370, Mus. Geol. Soc. London. 



Leaves considerably varied both in shape and size, broadly 

 linear, oval-linear, sub-linear, spathulate, or obovate. Apex 

 obtusely rounded. Lamina contracted at the base. Nerves 

 numerous, somewhat strong, fairly distant, sub-parallel, branching 

 dichotomously at a very acute angle, especially in the basal portion 

 and occasionally in other parts of the leaf. Fine and close longi- 

 tudinal striations occur between the nerves on the upper surface of 

 the leaf. The epidermal cells have rectilinear walls, and fine 

 punctures, indicating stomata, occur on the lower surface. 



The size of the leaf varies greatly, from 8-23 cm. or more in length, 

 and from 1-5 cm. across at the broadest part. The nerves are strong 

 (•2-"3 mm. broad), and are distant about '25-*75 mm. In some 

 cases, as Feistmantel pointed out, the leaf is slightly unsymmetrical. 



Feistrnantel l has described a variety which he named N. Hislopi, 

 var. subrhomboidalis (Text-fig. 37b), in which the leaf is rather 

 wider than usual in the upper portion and somewhat narrower 

 towards the base ; but in view of the great variety in shape and 

 size presented by these leaves, this form seems to me to be hardly 

 worthy of distinction. 



The leaf named by Kurtz, 2 Splienozamites multinervis, appears 

 to be probably a young or small leaf of a Noeggerathiopsis (cf. 

 Feistmantel (79 1 ), pi. xix, figs. 3-5), and I do not see any good 

 evidence for assuming that it represents a Cycadean frond. 



A leaf from the older Glossopteris-he&ring rocks of New South 

 Wales, at Greta, described by Feistmantel 3 as Noeggerathiopsis 

 prisca, hardly appears to me to be distinct from N. Hislopi. In 

 nervation it may be compared with the specimen figured here on 

 PI. VIII, Fig. 2, from India. 



1 Feistmantel (79 1 ), p. 24, pi. xx, fig. 2. 



- Kurtz (94 2 ), p. 130, pi. iii, fig. 2. 



3 Feistmantel (90), p. 155, pi. xiii, fig. 2. 



