1 



V 



I 



I 



I 



f 







f 



\ 



( 



5 













J 



KIDSTON : YORKSHIRE CAR]iONIFEROUS 



FLORA. 



159 



HOR.- 



-Rock below Haigh Moor 



Coal. L' 



OC- 



Br 



ightside, 



near 



Sheffield. 









- 





JJACTYLOTHECA 



^KIT.TER, 



1 







actyloth 



r 



eca plumosa Artis sp. 









^ 



Dactylotheca phtjuosa. Ante, pp. -^^^^ 106. 



Sphenopteris crenata. Ante, p. 30. 



Dactylotheca dentata. Ante, pp. ■t^()^ 106. 

 Additional localities. 



Middle Coal Measures. 



HoR. — Bar7isley Rock, Cooper's Colliery, Worsborough 

 Dale, near Barnsley (Colder). 



IIoR. — Barnsley Thick Coal. Locs.^Hickleton Main 



Colliery, near Rotherham (Type and fonna crenata) 



(Gelder). — Fence Colliery, near Rotherham {Type and 



for^na crenata) (Gelder). ^South Kirkby Colliery, near 



Pontefract (Gelder). 



HoR. — Rock below Haigh Moor Coal, Loc. — Brightside, 

 near Sheffield. 



Remarks : — In the first paper of the series dealing with 

 the Fossil Flora of Yorkshire,"^ I have fully treated of the various 

 forms which this fern assumes. To these various forms many 

 specific names have been given, but they insensibly pass into 

 each other. Such extreme forms ViS Fecopteris de?itata Brongt. 

 and Sphefioptcris crenata L. & H. seem at first sight very distinct 

 from each other, as well as from D. phunosa Artis sp., but they 

 are connected bv an unbroken chain of intermediate forms, 

 which makes it quite impossible to regard them as other than 

 mere conditions of the same fern. These different forms are 

 dependent on the position the small fragments, with which one 

 usually has to deal, held on the frond, which, from actual 

 specimens from the Somerset Coal Field, we know to have been 

 very large. The presence also of fruit in the specimens, some- 

 what alters the form of the pinnules. 



* T'-ans. Roy. Soc. Edin., Vol. XXXVIIL,, par^ II,, No. 5, pp- 203-223, Pis. 

 I— III., 1896. 



^ i 



