Vol. 69.] OUK KNOWLEDGE OF WEALDEN FLORAS. 89 



EuFILlCINEiE. 



Matonineae. 



Matonidium goepperti (Ett.). (PI. XIV, fig. 3a; text-fig. 2 C, 

 p. 91.) 



(Fairlight, Dawson Coll.) 



1843. Cycadites altliansii Dunker, Progr. d. li. Gewerbsch. Cassel, p. 7. 

 1852. Alethopteris goepperti Ettingsbausen, Abb. k.-k. Geol. Reicbsanst. vol. i. 

 pt. 3, No. 2, p. 16 & pi. v. 



The older specific name althausii has been revived by Lester 

 Ward, 1 and this unfamiliar designation is adopted also byMr.Iierry. 2 

 The latter author has recently instituted a new genus, Knowlton- 

 etta, 3 for some fronds from the Potomac Group of Maryland, cha- 

 racterized by a ' pseudo-dichotomous ' habit, a strong rachis, and 

 linear-lanceolate pinnules, which he assigns to the Matoniacese ; 

 but, in the absence of satisfactory fertile specimens, there would 

 seem to be no adequate reason for this reference. The portions of 

 fronds on which the genus Knowhonella is founded bear a close 

 resemblance to Phlebomeris spectanda Sap. from the Albian of 

 Portugal. 1 



The specimens of Matonidhmi goepperti in the Dawson Collection 

 show more clearly than any English examples so far described the 

 habit of the frond and the arrangement of the comparatively large 

 contiguous sori on the under surface of the pinnules. One of the 

 few spores obtained is reproduced in text-fig. 2 C (p. 91) ; it is 

 triangular in shape, with broadly rounded corners, and is approxi- 

 mately "06 mm. in diameter ; the wall is thick and smooth, and 

 is often more or less depressed along the sides. In the example 

 figured the wall has separated along the three-rayed ridge, leaving 

 a central space. The spores agree closely with some obtained from 

 a pinna of Matonidium from the Middle Jurassic beds of the 

 Yorkshire coast, for which I am indebted to Mr. Hamshaw Thomas, 

 and are of the same type as those figured by Schenk 5 from the 

 Wealden of Germany. 



Dipteridinese. 



Haesmannia pelletieei, sp. nov. (PI. XIV, figs. 1-3.) 

 (Fairlight, Dawson Coll.) 

 The genus Uausmannia, founded by Dunker 6 on leaves from the 

 Wealden Beds of Xorth Germany, has not hitherto been recognized 

 with certainty in the Wealden flora of England. It is owing to 

 the zeal and skill of Fathers Pelletier & Teilhard de Chardin that 

 I am now able to describe some particularly good specimens of 



- x Ward (99) p. 653. " Berry (11?) passim. 



3 Berry (ll 2 ) p. 233 & pis. xxv-xxvii. 



4 Saporta (94) p. 168 & pi. xxx, fig. 1 ; Zeiller (08) p. 192, fig. 7. 



5 Schenk (76) pi. xxvii, figs. 9 b & 9 c. 

 Dunker (46) p. 12. 



