294< Mr. Weaver on the Structure of the South of Ireland, 



either in the later transition limestones or in the carbonife- 

 rous limestone ; while Goniatites on the other hand, he re- 

 marks, are widely spread in strata both of the transition and 

 carboniferous epochs, extending in the latter series into the 

 coal formation'*. Now, at South Petherwin in Devon, Pro- 

 fessor Phillips has ascertained that at least four species of 

 Clymenics occur, undoubtedly belonging to the same group 

 as is found in the Fichtelgebirge, and among these one is 

 identified as the Clymenia Iccvigata of Count Miinster. "With 

 these he notices also two species of Goniatites, one of which 

 belongs to the same group that occurs in the Fichtelgebirgef. 

 But we need not rest here: other decided transition fossils 

 are met with in the older stratified rocks of Devon and Corn- 

 wall, e. g., various species of Terehratula and Atrypa, namely, 

 such as occur in the transition tracts of Sweden, in Gothland, 

 &c., together with species of Orthis, Pterinea, Leptcena lata, 

 &c., for the general list of which I refer to the work of Mr. 

 De la Beche already cited, as well as to the observations of 

 Professor Sedgwick and Mr. Murchisonij:. I cannot doubt 

 that more extended I'esearches in Devon and Cornwall will 

 vastly increase the list, and yet bring to light many facts of 

 high interest§. 



While on the subject of the distribution of organic remains, 

 I will add a few remarks on that of Goniatites in particular, 



* Ueber die im Rheinischen Uebergangsgebirge vorliommenden Goniatiten, 

 p. 22 (Beitrage, 1837). See also a translation of this Memoir in the An- 

 nals of Natural History for March and May, 1839. 



t See Mr. De la Beche's Geological Report of Cornwall, Devon, and 

 West Somerset, pp. 59, 60. 



X Proceedings of Geol, Soc, May 1838 j and Lond. and Edinb. Phil. 

 Mag., April 1839. 



§ It is remarkable that Prof. Sedgwick formerly considered the strata 

 containing the fossils that have been indicated (and which include also Trilo- 

 bites and Orthoceratites), as the lowest fossiliferous rocks in Devonshire and 

 Cornwall''. And yet, according to a later view, originating in the sugges- 

 tion of Mr. Lonsdale, Prof. Sedgwick and Mr. Murchison now include all 

 the older stratified rocks of Devon and Cornwall under the head oi old red 

 sandstone; and to this view it appears Mr. Greenough has been led to 

 conform, as shown by the colouring of those tracts in the new edition of 

 his Geological Map of England and Wales. Viewing the subject, as I do, 

 with the eyes both of a geologist and a miner, I must here, with all respect, 

 repeat my protest against any such generalization, such appearing to me 

 contrary to all analogy, and as only tending to confound subjects essen- 

 tially distinct. The designation as Devonian might not be equally objec- 

 tionable, as that does not necessarily bind us to more than what we actually 

 encounter within the limits of the older stratified rocks of Devon and 

 Cornwall, respecting which, however, we yet require much additional in- 

 formation. ' 



a See Mr. Ansted in Cambridge Phil. Trans., vol. vi. p. 422, 1836; and 

 Prof. Sedgwick in Proceedings of the Geol. Soc, vol. ii. p. 683, May 1838. 



