NATHORSTIA. 147 
V. 2376. Pl. IX. Figs. 2 and 2a. 
The specimen suggests either a delicate and graceful type of 
frond or large pinna, or a young condition of a more robust form. 
No venation is seen, except a slight trace of a midrib in some of 
the pinnules, eg. Fig.2a. Some of the smaller specimens referred 
to Oladophlebis Dunkeri (Schenk) have a certain resemblance to 
the upper pinne of this species, but the likeness is probably 
only superficial. The single pinna at * in Fig. 2, Pl. IX. agrees 
very closely with the pinne of Pl. VII. Fig. 5. Ecclesbourne. 
Rufford Coll. 
V. 2809. Pl. VII. Fig. 5. 
This specimen, 4 cm. in length, differs from V. 2876 (Pl. IX. 
Fig. 2) chiefly in the closer arrangement and stiffer habit of the 
pinne, and in the smaller size of the pinnules. The lowest pinna 
on the right-hand side of Fig. 5 agrees with those on the left side 
of the rachis and close to the apex of Pl. IX. Fig. 2. The matrix 
is different in the two figured specimens, and this fact alone is 
often sufficient to account for apparent differences in form. 
Several of the pinnules have lobed margins like those of Pl. IX. 
Fig. 2a, and here and there a midrib is indicated. 
I was at first inclined to refer this fragment to Géppert’s genus 
Gleichenites,: which includes several species from Mesozoic plant- 
bearing beds; but the small and incomplete nature of the material 
would hardly justify the choice of such a generic term in the 
absence of any definite evidence of a Gleichenia habit or fructi- 
fication. 
Cf. Gleichenia micromera, Heer,” also Pecopteris (Gletchenites) 
gleichenoides, O. and M.,* Trautschold’s figures of what he calls 
Asplenites Klinensis,t and Gleichenia multinervosa,’ Vel. Eccles- 
bourne. Rufford Coll. 
V. 2173 and V. 2219. Fragments of apical pinne: cf. Pl. IX. 
Fig. 2 (V. 2376), and the tips of the pinne of V. 2809, Pl. VII. 
Fig. 5. Ecclesbourne. Rufford Coll. 
1 Foss. Farrnkrt. 1836, p. 181. 
2 Flor. foss. Arct. vol. ii. pl. x. 
3 Pal. Ind. pt. i. 1863, vol. i. 1880, pl. xxv. 
4 Nouv. Mém. Soe. Nat. Moscou, vol. xiii. 1876, pl. xx. figs. 2 and 4. 
5 Abh. k. bohm. Ges. Wiss. vii. Folg. vol. ii. 1888, pl. iii. figs. 1 and 2. 
