Geol. Mag., 1908. 



Plate IV. 



4a 



Beiiirnse^ Collo. Derby. 



Figs. \-^.—Zanhi-entis omaliusi, Edw. & H ; and Figs. 5 to 8. — Varieti 

 CARBONIFEROUS L I IVI E S T O N E . 



