10 Mr. Weaver on the Geological Relations of the South of Ireland. 



wacke and slate tracts, the scale of these changes of curvature also varying. 

 An example of this kind may be seen, to the best advantage, on the western 

 side of the Isle of Innisfallen, in the Lower Lake of Killarney, when the lake 

 is at its lowest level, as well as in some of the adjacent islands. 



(13.) In the series of the greywacke, sandstone, and slate country now de- 

 scribed, T have to notice the organic remains which have occurred to me. Those 

 found in the transition limestone will be afterwards considered under that 

 head. The only quarter in Kerry, in which I discovered numerous organic 

 remains in the greywackeand slaty rocks, is situated on the western coast near 

 Ferriter's Cove, adjoining Smerwick harbour. They are there distributed in 

 slate and fine-grained greywacke, which occasionally effervesce with acids, 

 though no carbonate of lime be perceptible to the eye ; the petrifactions them- 

 selves appearing either as mere impressions, or as casts of the interior, com- 

 posed of the substance of (he rock, namely, of slaty matter, fine-grained grey- 

 wacke, &c. 



Among these 1 observed the Calymene Blumenbachii (Brongniart, pi. 1. fig. l.)tt', and ap- 

 parently also the Asaphus cajtdatMS (Brongniart, pi. 2. fig. 4.) f J, an Orthoceras, Euomphalus, two 



' The mark t implies that the species occurs in Great Britain or other countries, in the Transition 



System. 

 The mark * that the species occurs in Ireland, "I in the Carboniferous 



The mark ^ Great Britain or other countries, J System. 



See further hereon in §§. 53 and 57. 



In Europe the occurrence of the Calymene Blumenbachii and Asaphus caudatus may be ex- 

 emplified in the following manner : 



Transition. Carboniferous. 



{t Ferriter's Cove ; Dudley ; Led- T 

 bury; Tortworlh; Newton Bushel; >J Gottland, A. 

 Eifel ; Scania; Ostrogothia, &c. J 



{rj B^adnell, Northumber- 

 t Ferriter's Cove; Bonmahon coast, land (See Prof. Buckland's 

 county of Waterford ; Dudley; Led- -^ excellent BridgewaterTrea- 

 bury ; Tortworth. I tise); Coalbrook Dale (Mr. 



lPrcstwichMS.)Gottland,A. 

 The division of the Gottland limestone marked A, is referred by Mr. Hisingcr to the carboni- 

 ferous epoch, but some doubt seems to attach to tlie correctness of that reference. (See Mr. De 

 la Beche's Geological Manual, Srd edition. By some miscliance the Asaphus caudatus is omitted 

 in Mr. De la Beche's list of transition fossils.) 



On the other hand, in the United States of North America, the Calymene Blumenbachii occurs 

 also both in the transition and carboniferous systems, but the Asaphus caudatus has not yet been 

 met with in the latter : e. g. 



Transition. Carboniferous. 



it Glenn's Falls, upon the Hudson"] 

 River, Trenton Falls, upon the j I Black Rock on Niagara, 

 M 



Calymene Blumenbachii. . <j Mohawk River, — both in the State J» (see Annals of Lyceum of 

 I of New York; Cincinnati; Louis- i New York, vol. i. part 1. 

 I ville on the Ohio. J 



, 1 . ft Glenn's Falls upon the Hudson; 



Asaphus caudatus | Cincinnati ; Louisville on the Ohio. 



(See Dr. Harlan in the 1st vol. of the Transactions of the Geological Society of Pennsylvania ; 



