Vol. 69.] PE0E. A. C. SEWAED ON WEALDEN FLOEAS. 101 



confirmation of the extension of Dunker's definition of the species, 

 to include pinnae considerably larger than any obtained by him 

 from German strata. 



Specimens of Otozamites similar to 0. Mipsteinii have recently 

 been figured by Mr. Hamshaw Thomas 1 from Jurassic beds in 

 Southern Russia. 



Ctenis sp. (PI. XII, figs. 1 a, 1 b, & 2.) (Rufford Coll.) 



The pieces of linear pinnce represented in figs. 1 & 2, although 

 too small to be assigned to a species, afford evidence of the 

 occurrence of the genus Ctenis in the Wealden flora. The enlarged 

 drawing (fig. 1 b) shows very clearly the Ctenis type of venation. 



A frond previously figured from the Sussex coast as (1 ) Zamites sp.' 2 

 was compared with Ctenis, which it closely resembles in habit ; 

 but no anastomosing veins were discovered. In all probability, 

 that specimen is specifically identical with fronds from the 

 Kimmeridgian beds of Sutherland, for which a new generic name, 

 Pseudoctenis,* has been instituted. 



CrcADEAN Stems. 



The Dawson Collection includes a few pieces of Cycadean stems, 

 which agree generally, in the form of the leaf-bases or persistent 

 scale-leaves, with BucMandia anomdla Carr. 4 One of them has 

 rhomboidal leaf-bases, 2 cm. deep by 2*2 cm. in breadth, which are 

 very similar to those on Jurassic stems assigned to Williamsonia 

 gigas. 5 Another specimen represents a narrow and incomplete 

 stem 39 cm. long, with a few imperfect leaf-bases like those of 

 BucMandia, Yatesia, and Fittonia, genera which are not distin- 

 guishable by well-defined characters. This and other examples of 

 stems from the Sussex coast show that some of the Cycadean 

 plants of the Wealden flora possessed long and narrow stems like 

 those of some recent species of Cycas and the genus Microcycas ; 

 and the absence of any fertile lateral shoots of the Bennettitean 

 type is an interesting feature, pointing to the occurrence of flowers 

 either at the apex of the main stem, or on elongated peduncles 

 of the Williamsonia type. 



Euey-Cycadolepis. (PI. XII, figs. 3«-4c; PI. XIV, fig. 6; 

 and text-fig. 6, p. 102.) 



(Fairlight Clay, Fairlight ; Dawson Coll.) 

 In Part II of the ' "Wealden Mora ' several specimens were 

 described under Saporta's generic term Cycadolepis, the broader 



i Thomas (11) pi. v, fig. 11 & pi. vi, figs. 1-2. 2 Seward (95) p. 89, fig. 5. 

 3 Seward (11) p. 692. * Carruthers (70) pi. liv, figs. 1-3. 



s Williamson (70) pi. liii, fig. 5. A similar stem has been recorded from 

 the Uitenhage Series (Wealden) of Cape Colony : Seward (07) pi. xxi, fig. 9. 



