Vol. 69.] OUR KNOWLEDGE OF WEALDEN FLORAS. 99 



The fronds figured by Saporta from the Kimmeridgiau of Orba- 

 gnoux (Ain), and from Portugal, as Scleropteris zeitteri 1 agree very 

 closely with the English type ; and an equally close resemblance 

 is presented by S. pomeli Sap., 2 a type recently recorded from 

 Sutherland under the generic name Dichopteris, which was adopted 

 in preference to Saporta's generic term Scleropteris. 2 



CYCADOPHYTA. 



Bennettitales. 



WiLLLIAMSONIA CARRTJTHERSI (?) Sew. 



(Fairlight, Eufford Coll.) 



1895. A. C. Seward, ' Wealden Flora ' pt. 2, p. 157 & pis. x-xi. 



A specimen in the Eufford Collection (V 3766), acquired by the 

 British Museum (Natural History) since the publication of the 

 ' Wealden Flora,' is worthy of notice as being probably a peduncle 

 of W. carruthersi. It is the impression of an axis 13 cm. long, 

 which, with the exception of some crowded leaf-scars at one 

 end, is characterized by the occurrence of narrow and rather 

 widely-separated scars, probably marking the position of linear 

 bracts. These scars are 2 to 2*5 cm. apart in a vertical line ; they 

 agree in size and shape with the bracts of the fructification of 

 W. carruthersi. 4 The specimen may be compared with peduncles 

 of Williamsonia from the Jurassic rocks of Yorkshire. 5 If the 

 assumption that this Wealden peduncle bore an apical flower 

 of W. carruthersi is correct, it affords an argument in support of 

 the adoption of the generic name Williamsonia in preference to 

 Bennettites. 



CYCADOPHYTA IiYCEBJLE SEDIS. 



Otozamites klipsieinii (Dunk.). (Text-fig. 5, p. 100.) 



(Eairlight Clay, near Cliff End, Hastings ; Eufford Coll.) 



1846. Cyclopteris klipsteini, Dunker, ' Monographic der Norddeutschen 



Wealdenbildung ' p. 11 & pi. ix, figs. 6-7. 

 1895. Otozamites Iclipsteinii Seward, 'Wealden Flora' pt. 2, p. 60 & pi. i, 



figs. 3-4 ; pi. vii. 



In the ' Wealden Flora' some specimens were referred to Dunker's 

 species, although the size of the pinnge greatly exceeds that of 

 the type-specimen and the examples subsequently figured by 

 Schenk. The specimen reproduced in text-fig. 5 (V 3709) affords 



1 Saporta (91) p. 434 & pi. eclxxxviii (or lxii), fig. 1 ; id. (94) p. 4G, pi. x, 

 fig. 2 ; pi. xi, figs. 14-15; & pi. xii, fig. 1. 



2 Saporta (73) pi. xlvi, fig. 1 & v>l. xlvii, figs. 1-2. 



a Seward (11) p. 678, pi. iii, fig. 55 & pi. iv, fig. 71 ; see also Seward (10) p. 552. 



4 Cf. Seward (95) pi. x, fig. 1 & pi. xv, fig. 3. 



5 Saporta (91) pis. xv-xvii ; Seward (97) ; Wieland (11). 

 Schenk (71) pi. xxxi, fig. G. 



TT 2 



