12 INTRODUCTION. 



A&terophyllites? lateralis (Phill.) = Equisetites columnaris, Brongn. 



Calamites Beani, Bunb. [Type in the Manchester Museum ; figured by Gardner 



(86), pi. ix. fig. 2 ; vide also Seward (98), fig. 60.] = Equisetites Beani 



(Bunb.). 

 Cryptomerites? divaricatut, Bunb. (Type in the Leckenby Coll., Cambridge.) 



= Cryptomerites divaricatus, Bunb. 

 Palissya? Williamsonis = Pagiophyllum Williamsoni (Brongn.). 



The two folio volumes by Zigno entitled Flora Fossilis 

 Formations Oolithicce, published between 1856 and 1885, 1 contain 

 numerous references to British Jurassic plants ; these are quoted 

 in the lists of synonyms of the various species dealt with in the 

 Catalogue. 



In Hugh Miller's Testimony of the Rocks* reference is made 

 to the occurrence of several plants in the Helmsdale deposits of 

 Sutherlandshire 5 identical with Lower Oolite species from the 

 Yorkshire coast. The Mesozoic flora of Scotland is in need of 

 further investigation, and it is proposed to deal elsewhere with the 

 botany and geology of these northern species. 



In 1864 Leckenby 4 described and figured "some new or 

 imperfectly known species" of East Yorkshire plants ; most of the 

 specimens dealt with are included in the Leckenby Collection, 

 which Professor Adam Sedgwick purchased in 1872 for the 

 "Woodwardian Museum, Cambridge : 5 



Cycadites zamioides, Leek. (Type in the Leckenby Coll., "Woodwardian Museum, 



Cambridge.) = Taxltes zamioides (Leek., ex Bean MS.). 

 Palteozamia pecten = Williamsonia pecten (Phill.). 

 Pterophyllum comptum = Nilsnonia compta (Phill.). 



P. medianum, Leek., ex Bean MS. ) , r ,. , T , -p. -..-0 \ 



,,_ > = J\ . mediana (Leek., ex Bean MS.). 

 P. angustifolium, Leek., ex Bean MS. ; 



? P. minus, L. & H. = Anomozamites Nilssoni (Phill.). 



Ctenis Leckenbyi, Leek., ex Bean MS. = Ptilozamites Leckenbyi. 



Otopteris mediana, Leek. (Type in the Leckenby Coll.) = Otozamites Beani 



(L. &H.). 



0. lanceolata, Leek., ex Bean MS. = Williamsonia pecten (Phill.). 

 0. graphica, Leek., ex Bean MS. (Type in the Leckenby Coll.) = Otozamites 



graphieus (Leek., ex Bean MS.). 

 0. tenuata, Leek., ex Bean MS. (Type in the Leckenby Coll.) = 0. Bitn- 



buryanus, Zign. 



1 Zigno (56-85). 



2 Miller (57), pp. 477 et seq. 



3 Vide also Judd (73). 

 Leckenby (64). 



5 Clark, J. W. & Hughes, T. McKenny (90), vol. ii. p. 465. 



