BY A. fi. WALKOM. 



75 



flowers associated with these sterile fronds of FtMophyllum 

 ppxten. Pterophylhim A'athorsli occurs in the Jurassic of Suth- 

 erland, Scotland, and very similar forms occur in the Jurassic of 

 Oregon ; Ptenyphyll nni contigiiuin occurs in the Jurassic of 

 Oregon, and also in the Rhsetic of 'J'onkin. Pseiidoctenis eathi- 

 eiisis is practically identical with specimens from tlie Jurassic of 

 Yorkshire and Sutherland. The three species of Otozamites, 0. 

 ohtusiL.s, Feisimariteli, and 0. Maiidelslohi are species occurring 

 widely in Jurassic rocks, and 0. Mandehlohi occurs in the 

 Mixteca-Alta flora of Mexico. 



Coniferales. — Remains of Conifers are not abundant in the 

 Walloon Series. Cones have been described, and referred to the 

 genus Araucarites, indicating that they are similar in general to 

 cones of the present-day Araucatia. A few fragments have 

 been referred to the genus Br achy phy Hum, and some specimens 

 to Taxites. The specimens referred to Taxites planus show a 

 very close resemblance to, and are probably identical with, that 

 species, as described from the Upper Gondwana Beds (Liassic) 

 on the Madras coast of India. Similar forms to Brnchyphyllum 

 crassutn occur in the English Jurassic floras. 



The accompanying Table (Table v.) shows the flora of the 

 Walloon Series arranged in two columns, column 1 including 

 those species comparal)le with species occurring in beds older 

 than Jurassic, and column 2 those comparable with Jurassic 

 species. 



Tabi.e v. 

 Flora of ^Valloon (Series, showing affinities of species with regard to age. 



Species with affinit}^ to , 

 Species older than Jurassic. 



Species u-jth affinity to Jurassic 

 Species. 



Equ ixet ite>< rot iftra m 



Schizoneara sp. a 



(J/ a. doph I eh is a ns( ra/is 



C. Roy hi 



Th in nfeJdia Ftistma ntel i 



Th. odontopteroides 



Th. laiicifoUa 



Equisedtes rofiferum (M. Jur.) 

 E. cf. rajmahaltnsus (Liassic) 

 Cladopldehix ausfra/is (L. Oolite) 

 Phhhopferis ahthopteroidt.^ (L. Oolite) 

 Dictyophylhim rwjosum (L. Oolite) 

 Htoi-^inaiiiiiii (''.) /Jiir/iii {]j\tiHH\c; Kimeridge) 

 Sagtnopteris rhoifolia {S. PJiiHipsi; Oolite) 



