LIASSIC SI STEM. 



25 



Reference must be made also to Horace B. "Woodward's 

 important memoir on the Lias of England and Wales (Yorkshire 

 ■excepted). He gives the following list of plants from Dorsetshire, 

 Yorkshire, and other parts of England : — ' 



Brachyphyllum solitarium, PhUl. 

 WarwicksMre. (Lower Lias.) 



Pachyphyllmn peregnnum, Sternb. 

 Dorsetshire, Gloucestershire, and 

 Yorkshire. (Zones of A. Bucklandi, 

 A. oxynotits, A. serpentinus.) 



■Cyeadites concentrktis. Rich. 



This specific name was proposed by- 

 Richards for a Lias specimen in the 

 British Museum. 



'C. rectangularis, Brauns. 

 Dorsetshire. (Lower Lias.) 



^ycadeoidea pijgmaa, L. & H. 

 Dorsetshire. (Lower Lias.) 



Otozamites aciumnatus^ L. & H. 

 Somersetshire and "Warwickshire. 

 (Lower Lias.) 



= Pagiophyllmn percgr'mum (Sternb.). 



= ycadites rectangularis, Brauns, 



•<). gracilis, Phill. 

 Gloucestershire. 

 orbis.) 



O. obtnsus, L. & H. 



Devonshire, Dorsetshire, Somerset- 

 shire, Gloucestershire, Warwick- 

 shire, and Yorkshire. (Zones of 

 A. phnorbis and A, Bucklandi.) 



Ptilozamites Sergeri, Gopp. 

 Dorsetshire. (Lower Lias.) 



P. Leckenbyi, Bean. 



Dorsetshire and Yorkshire. (Lower 

 Lias.) 



Yatesia gracilis, Carr. 

 Dorsetshire. 



Clathropteris platyphylla (Gopp.). 

 Gloucestershire. (Lower Lias.) 



= C. rectangularis, Brauns. 



= Cyeadeoidea pygmaa, L. & H. 



= ? Otozamites obtusus (L. & H,). 



I have not seen any example of 

 0. acuminatua from English Liassic 

 beds. 

 This species of Phillips is, I believe, 

 (Zone of ^. ^to«- identical with Williamsonia pecten 



(Phill.),'' a type not represented 

 among Liassic Cycads. 

 Otozamites obttisus (L. & H.). 



= Ctenopteris eycadea, Brongn. 

 = Ctenopteris cyeadea, Brongn. 



= Cyeadeoidea gracilis (Carr.). 



= Clathropterls platyphylla (Gopp.). 



(Described under Ehffitic plants in 

 the present volume, p. 18.) 



" Woodward, H. B. (93). 

 ^ Seward (00), p. 190. 



