Palaeozoic Species mentioned in "Fossil Flora!' 367 



PL xcv. Knorria TAXiNA, L. and H. 



Locality. — Jarrow Colliery. 



Horizon. — Lower Coal-Measures. Eoof of High Main 

 Seam. 



Eeniarks. — The Knorria tccscina, L. and H., is the stem of 

 CoRDAiTES, and the form which occurs commonly in the 

 Lower Coal-Measures. The original is preserved in the 

 " Hutton Collection." 



PL xcvi. Calamites. The base of a stem. 



Locality. — Jarrow Colliery. 



Horizon. — Lower Coal-Measures. Roof of the Bensham 

 Seam. 



Remarks. — This is evidently referable to Calamites 

 SuCKOWii, Brongt. 



PL xcvii. Knorria Sellonil 



Locality. — Felling Colliery. 



Horizon. — Lower Coal-Measures. 



Bemarks. — The plant figured by Lindley and Hatton does 

 not appear to be similar to Sternberg's Knorria Sellonii. 

 The surface of Lindley and Hutton's specimen, which is 

 preserved in the *•' Hutton Collection," is covered with fine 

 transverse lines. When the light falls on the specimen at 

 right angles to the direction in which these fine lines run, a 

 series of rather coarser longitudinal lines is brought out. 

 The scars do not show any definite structure, but are 

 bounded by an irregular basal ridge, giving the appearance 

 as if some organ had been forcibly broken off. In front of 

 this ridge is a slight hollow, bounded by two longitudinal 

 depressions. I have a somewhat similar fossil from the 

 Radstock Coal Field, and am equally ignorant of its affinities. 



Pis. xcviii., xcix. Lepidodendron Harcourtii, Witham. 



Locality. — Hesley Heath, near Rothbury, Northumberland. 

 Horizon. — Coal-Measures.^ 



^ The type is in the York IMuseura. 



