NiTHOESTIA. 147 



V. 2376. PI. IX. Figs. 2 and la. 



The specimen suggests either a delicate and graceful type of 

 frond or large pinna, or a young condition of a more robust form. 

 "So venation is seen, except a slight trace of a midrib in some of 

 the pinnules, e g. Fig. 2a. Some of the smaller specimens referred 

 to Claiophlelis Dunkeri (Sohenk) have a certain resemblance to 

 the upper pinnae of this species, but the likeness is probably 

 only superficial. The single ninna at * in Fig. 2, PI. IX. agrees 

 very closely with the pinnse of PI. VII. Fig. 5. Eoclesbourne. 



Ruffori CoU. 



V. 2809. PI. VII. Fig. 5. 



This specimen, 4 cm. in length, differs from V. 2376 (PI. IX. 

 Fig. 2) chiefly in the closer arrangement and stiffer habit of the 

 pinnae, and in the smaller size of the pinnules. The lowest pinna 

 on the right-hand side of Fig. 6 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 suflicient to account for apparent differences in form. 



Several of the pinnules have lobed margins like those of PI. IX. 

 Fig. 2a, and here and there a midrib is indicated. 



I was at first inclined to refer this fragment to Goppert's genus 

 Gleichenites,^ which includes several species from Mesozoio 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 Qleichenia habit or fructi- 

 fication. 



Cf. Ghiehenia mioromera, Heer,^ also Pecoptens {Gleichenites) 

 gleiohenoides, 0. and M.,' Trautschold's figures of what he calls 

 Asplenites Klinensis,^ and Qleichenia multinervosa,^ Vel. Eccles- 

 bourne. Rufford Coll. 



v. 2173 and V. 2219. Fragments of apical pinnse : cf. PL IX. 

 Fig. 2 (V. 2376), and the tips of the pinnEe of V. 2809, PL VII. 

 Fig. 5. Eoclesbourne. Ruffori Coll. 



• Foss. Farmkrt. 1836, p. 181. 

 ' Flor. foss. Arct. toI. iii. pi. x. 



3 Pal. lud. pt. i. 1863, vol. i. 1880, pi. xxv. 



* Nouv. Mem. Soo. Nat. Moscou, vol. xiii. 1876, pi. xx. figs. 2 and 4. 



' Ath. k. bolua. Ges. "Wiss. vii. Folg. vol. ii. 1888, pi. iii. figs. 1 and 2. 



