128 



THE GEOLOGIST, 



over the coal. There are some curious circumstances connected with 

 these ferns ; they are exceedingly uncertain in their whereabouts, and 

 were very much more abundant when the workings were first begun 

 than they are now. Sometimes the workmen would come upon a 

 large quantity of one sort, such as Pecopteris Mantelli, which would 

 then utterly disappear, and would not be found again. From the fact 

 of several Sigillariae being found in erect position, I at first inclined to 

 the opinion that the ferns were in the same place on which they grew ; 

 but on a fuller consideration of the matter, I now think, with 

 Professor Melville, that this is a drift formation. I have obtained 

 here, with the help of two very intelligent miners named Davis and 

 Hart, who appear as much interested in the geological facts as myself, 

 the following specimens : — 



Annularia brevifolia Pecopteris dilatata 



Asterophyllites foliosus „ Cistii 



Parkinsoni „ eaudata 



longifolius laciniata 

 Calamites approximatus „ Mantelli 



„ cannagformis ,, nervosa 



Suckowii repanda 

 Fructification of an Equisitaceous plant serra 

 Hippurites longifolius ,, Stuttgardiensis 



Knorria imbricata urophylla 

 Lepidodendron crenatum Pinnularia capillacea 



„ elegans Pterophyllum 



,, minus Sigillaria flexuosa 



obovatum oculata 

 „ Sternbergii pachyderma 



„ plumarum „ reniformis 



Lepidostrobus „ tesselata 



Neuropteris acuminata Stigmaria 



„ giganteft Sphenopteris affinis 



heteropbylla „ eaudata 



„ macrophylla ,^ dilatata 



Pecopteris adiantoides „ elegans 



„ dentata „ latifolia 



„ denticulata „ macilenta 



In the three-quarter coal a shell, (a terebratula, I believe,) has been 

 found by my friend Mr. Adams, also a shell in the Bydyllog coal. 



The upper Darren coal and mine shale possesses two species of small 

 Unios and an Avicula. The black band over the old coal has furnished 

 us with a large Anthracosia and a small shell like a Nucula, also 

 the scales of Holoptychius. The spotted and black pins have the 

 Anthracosia agrestis and Microccnchus carbonarius, while the bottom 

 vein is very prolific in scales (carved and enamelled), teeth, jaws, 

 opercular scales, bones, skin, rays and ichthyodorulites of fishes belong- 



