ISO William Hellter Baily 



grounds formed of the granite and slate is alone present." Various 

 observers have described this more recent deposit, which on the 

 eastern summit of Mount Pelier is found at an altitude of 1,235 

 feet above the sea, and on the western side of the Three Rock 

 Mountain at an elevation of 1,200 feet. 



Marine shells of existing species have lately been found by the 

 Rev. Maxwell H. Close, near Caldbeck Castle, on Kilmashogue 

 Mountain, at an elevation of a little over 1,200 feet, from a 

 gravel and sand pit (the " limestone gravel" of Ireland). The fol- 

 lowing were collected : — * 



Fusus 1 part of columella. 



Cardium echinatum. 



Cyprina Islandica. 



Venus striatula. 

 „ casina ? 



Mactra stultorum, with perforations made by a small shell-boring 

 Annelid. 



At Bally edmondufF, on the S.E. side of the Three Rock Moun- 

 tain, on the road leading from Stepaside to Glencullen, at an 

 elevation of 1,000 feet, from a similar gravel pit, " chiefly composed 

 of clean stratified gravel and sand," the same gentleman collected 

 the following shells, &c. : — 

 Trophon muricatus. 

 Fusus l part of columella. 

 Turritella communis. 

 Ostrea edulis. 

 Pecten (two species). 

 Cardium edule. 



„ echinatum. 

 Astarte compressa. 

 „ elliptica. 

 „ sulcata. 

 Cyprina Islandica. 

 Artemis lincta. 

 Venus striatula. 



„ casina. 

 Lutraria elliptica. 

 Mactra stultorum 1 

 Tellina? 

 Mya truncata 1 

 Pholas crispata. 



Balanus balanoides and perforations ascribed to a small shell- 

 boring Annelid. 



* Journal of the Royal Geological Society of Ireland, vol. iv., part 1., new series, p. 

 36, etc. 



