.~>4 MB ROBERT KTDSTON ON 



been sent me by Mr T. Crosbee Cantrill (pi. ii. fig. 7). All the Yorkshire examples 

 come from Wooley Colliery, Darton, and for which I am entirely indebted to Mr W. 

 Hemingway. The form of the bracts and the ciliate margins easily distinguish this 

 from all other described species. 



Description of Specimens. 



PL II. fig. 2. 



This example shows the base and the apex of the cone. Unfortunately the central 

 part connecting these two portions was lost. It shows the peduncle with distinct 

 ribbing on its upper region, but this is not so clearly seen as the peduncle is followed 

 downwards. 



PL II. fig. 3. 



This small fragment is the most interesting of all the specimens, as it shows the 

 form and structure of the macrosporangia. There is also another example which shows 

 the sporangia (No. 2268), but it does not exhibit them so distinctly. 



Two of the sporangia, marked a on fig. 3, are enlarged four times at fig. 3a. The 

 sporangia are evidently formed by a hollowing of the basal portion of the bract, and its 

 walls seem to be only the modified upper and lower surface of the bract, which again 

 unite at the point indicated by the letter a (fig. 3a) to form the upper lanceolate 

 extension of the limb. This structure is quite analogous to that found in Isoetes. 



PL II. fig. 4. 



This shows the basal portion of a cone. The bracts are removed from the upper 

 part of the specimen which exhibits the axis. One of the bracts, by displacement, is 

 seen to extend past the others at b, and thus shows distinctly its form. Numerous 

 macrospores occur scattered among the bracts, two of which, magnified ten times, are 

 drawn at fig. 9 pi. ii. 



PL II. figs. 5, 6, 7, and 8. 



These give figures of isolated bracts and portions of the margins enlarged to show 

 the cilia, which vary a little in their size and regularity. 



Middle Coal Measures. 



Locality. — Wooley Colliery, Darton, near Barnsley, Yorkshire. 



Horizon. — Barnsley Thick Coal. (W. Hemingway.) 

 Locality. — " Road Section," Cooper's Mill, Dowles Valley, Forest of Wyre. 



Horizon. — (?). (T. Crosbee Cantrill.) 



