Mr. Weaver on the Geological Relations of the South of Ireland. 21 



In the limestones mentioned in §§. 31 and 32 organic reliquiae appear very 

 sparingly. 



(33.) In addition to the organic remains noticed by me in the transition 

 limestone in the preceding §§. 21 to 32, I here subjoin a list of those observed 

 by Mr. S. Wright in the Cork limestones, for which list and their localities I 

 am indebted to that gentleman, almost all the species having been determined 

 by Mr. James de Carle Sowerby. The locality given as Cork, implies that the 

 species were derived from quarries near that city, in the direction of the vil- 

 lage of Evergreen ; while that of Ballinlough denotes a position nearly half 

 way between the city and the extremity of the peninsula of Black Rock. To 

 the localities of those species which have been found also in the transition tracts 

 of Great Britain or other countries I have affixed the mark f ; to those occur- 

 ring also in the carboniferous limestone of Ireland, the mark * ; and to such 

 as have been met with likewise in the carboniferous limestone of Great Britain 

 or other countries, the mark J. From this list it will be obvious that many 

 species of Productae, Spiriferae, and Terebratulae, in particular, are common 

 to both the transition and carboniferous epochs. For many of the distinct 

 locahties of these and other organic remains specified, reference may be 

 further had to Sowerby 's Mineral Conchology ; the 3rd edition of Mr. De la 

 Beche's Geological Manual, 1833; the German modified translation of the 

 2nd edition of the same work by M. von Dechen, 1832, and the French 

 translation of the 2nd edition of same work by M. Brochant de Villiers, 1833 

 (the latter being distinguished by very useful references to the published 

 figures of fossils, as well as by other additional matter); also the excellent 

 work on Geology in the Encyclopedia Metropolitana by Professor Phillips; 



and to other authors'. 



>-, Localities in In other 



Crustacea. South of Ireland. Transition Tracts. 



Two species of Trilobite, undetermined .... Black Rock. 



The tuberculated species of Asaphus, figured 

 by Brongniart, Plate IV. fig. 12. (Asaphus 



gemmuliferus of Professor Phillips) * J Cork. 



Cephalopoda polythalamia. /Malmoe; Christiania; 



Orthoceras striatum, (Sow. T. 58.) * Black Rock. +< Trenton Falls, (New 



^ ^ I York.) 



O. Breynii, (Sow. T. 60, fig. 5.) * I Ditto. 



' This list may serve to clear up some doubts expressed by Professor Phillips in the Encyclo- 

 pedia Metropolitana, art. Geology, pp. 577 and 578, as to the occurrence of certain fossils in 

 the transition limestone of the South of Ireland. Compare also with pp. 572 to 576, and pp. 579 

 to 581 of the same work, which have reference to the fossils of transition tracts in general. With 

 the view of drawing the attention of geologists further to this subject and exciting inquiry, I have 

 appended a note to each of the lists of the Productae, Spiriferae, and Terebratulae, found in the 

 Cork limestones, showing what other species of these genera are stated to have been discovered 

 both in the transition and carboniferous systems of other countries. 



