362 Proceedings of the Royal Physical Society. 



PL Ivi. SiGILLARIA ALTERNANS. 



Locality. — Cramlington Colliery, Northumberland. 

 Horizon. — Lower Coal-Measures. 



PL Ivii. SiGILLARIA RENIFORMIS. 



Locality. — " Newcastle." 

 Horizon. — Lower Coal-Measures. 



PL Iviii. SiGILLARIA CATENULATA. 



Locality. — Jarrow Colliery. 



Horizon. — Lower Coal-Measures. 



Remarks. — Pis. Ivi., Ivii., Iviii. represent decorticated con- 

 ditions of Sigillaria. I believe it quite useless to attempt 

 to identify such specimens, as several well-marked species in 

 the decorticated condition cannot be specifically distinguished. 



PL lix. SiGILLARIA OCULATA. 



Locality. — ICillingworth Colliery, Northumberland. 



Horizon. — Lower Coal-Measures. 



Remarks. — The specimen figured by Lindley and Hutton 

 is contained in the " Hutton Collection." The fossil is not 

 well represented on the plate, but from a careful examination 

 of the specimen, I believe it is probably Sigillaria ovata, 

 Sauv.i 



PL Ixv. POLYPORITES BOWMANNI, L. and H. 



Locality. — Coal Pit, near the entrance of the Vale of 

 Llangollen, Denbighshire. 



Remarks. — This is a fish scale. 



PL Ixx. SiGILLARIA ORGANUM. 

 Locality. — Jarrow Colliery. 

 Horizon. — Lower Coal-Measures. 



Remarks. — The preservation of this specimen is such as to 

 prohibit any specific determination being made. 



1 Sauveur, Veget. foss. d. terr. houil. d. Belgique, pi. li. , fig. 2 ; Zeiller, 

 Flore foss. d. bassin liouil. d. A''alenciennes, p. 522, pi. Ixxix., figs. 4-7 

 (fig. 3?). 



