290 Mr. Weaver ow the Structure of the South of Ireland, 



of limestone, with their bounding schistose and conglomerated 

 rocks, which in their range traverse Cork harbour, and which 

 according to my observations are all in parallel position, with 

 a dip to the south ; but Mr. Griffith represents them as forming 

 successive troughs, with corresponding anticlinal and synclinal 

 dips, of which I certainly have no knowledge. In one essen- 

 tial point, however, we are agreed, namely, that these parallel 

 bands of limestone show, wherever exposed, an interstratifica- 

 tion with the adjacent clayslate,both rocks exhibiting in general 

 the same organic remains; which are also contained in the clay- 

 slate still further south, on the north side of Ringabella inlet, 

 and again on ihe same parallel to the west, adjacent to the 

 road leading from Cork to Brandon. But in the clayslate 

 and sandstone subordinate to it are found also vegetable re- 

 mains, showing a further analogy to similar rocks north of the 

 Bride, to those north of the Blackvvater, and at Dunmore 

 head in Kerry. Mr. Griffith has given us a list of transition 

 fossils which he had collected at Ferriter's cove; and another 

 list of those he had obtained from the limestone and clayslate 

 of Cork harbour, at Rostellan, Rinniskiddy, &c. Of the lat- 

 ter Mr. Sowerby has pronounced some species to be the same 

 as occur in the carboniferous limestone, and others to resem- 

 ble such as are found in the older stratified rocks of Devon- 

 shire; and it might be added also such as occur also in Ferri- 

 ter's cove and in the Silurian system, e. g., LejJtcena (Producta) 

 lata, Lepticna depressa. I may also add, as a further analogy, 

 that in the older stratified rocks of Devon and Cornwall, ve- 

 getable remains are likewise met with ; e. g., in Devon as ob- 

 served by Major Harding, the Rev. D. Williams, Professor 

 Sedgwick, and Mr. Murchison ; and in Cornwall by Pro- 

 fessor Sedgwick, as noticed by Mr. Ansted in his paper on 

 Efidosiphojiites ■* (the Clymenia. of Count Miinster.) 



Every addition to our knowledge is valuable, and I trust 

 Mr. Griffith will continue to employ hands in the south of 

 Ireland in collecting fossils, for which he possesses so many 

 opportunities. 



I have now to advert to Mr. Griffith's section in the Dingle 

 peninsula, in the west of Kerry, which in no part exactly ac- 

 cords with my observations. In this section the vertical 

 scale is to the horizontal scale as five to one. But the por- 

 tion which more immediately claims attention is thai which 

 extends from the summit of the old red sandstone of the 

 Slieve Meesh range f to the carboniferous limestone in the 



* Cambridge Phil. Trans., vol. vi, 1838. 



f Called Cahirconree by Mr. Griffith, but which denomination I conceive 

 to apply strictly to the mountain range stretching to the westof Bartrigoun, 



