196 A. W. WATERS ON THE PLEISTOCENE OF ISCHIA. 



17. On some Foraminifera from Pleistocene Beds in Ischia. By 

 M. Ernest Vanden Broeck, Membre des Societes Malaco- 

 logique et Geologique de Belgique &c. &c. Preceded by 

 some Geological Remarks by Arthur Wm. "Waters, Esq., 

 F.G.S. (Read February 6, 1878.) 



JStratigrajjhical Note. 



Sir Charles Lyell, in the first edition of the ' Principles,' called 

 attention to the fossiliferous deposits occurring at a considerable 

 height in the Island of Ischia, near Naples, and containing shells 

 which, with one exception, are the same as those now living in the 

 Mediterranean. In each edition of both ' Elements ' and ' Principles ' 

 they have also been mentioned, though somewhat less fully. 



Iu this island there are fossiliferous deposits of three different 

 ages, of which the Monte-Buceto clay occurring up to 1800 feet 

 above the sea-level*, is the oldest, while the others should be classed 

 with "raised beaches." As Sir Charles Lyell says f, " In Ischia I 

 collected marine shells in beds of clay and tuff, not far from the 

 summit of Epomeo or San Nichola, about 2000 feet above the level 

 of the sea, as also at another locality, about 100 feet below, on the 

 southern declivity of the mountain, and others not far above the 

 town of Moropano. At Casamicciol and several places near the sea- 

 shore, shells have been long observed in stratified tuff and clay. From 

 these various points I obtained, during a short excursion in Ischia, 

 28 species of shells, all of which, with one exception, were identified 

 by M. Deshayes with recent species." It seems uncertain whether 

 the fossils given in his list were not collected from beds of various 

 ages ; and the list itself has given me that impression on a comparison 

 with my own collection. 



Sig. F. Fonseca J has given the following list of shells from the 

 Buceto beds : — 



Nassa prismatica, Cassis undulata, 

 Solen coarctatus, Turritella communis, 

 Eissoa polita, Nucula sulcata, 

 Natica sordida, Murex vaginatus, 

 Valenciennesii, Fusus rostratus. 



In a paper read to the Manchester Geological Society §, I added 



* This is not caused by alteration of relative level of a wide area, as in the 

 case of the Macclesfield and Moel-Tryfaen beds, but is the result of local move- 

 ment, which has raised the whole of the island of Ischia, with Monte Epomeo 

 in the centre, dipping at an angle of about 30° in an easterly direction. 



t ' Principles of Geology,' by Charles Lyell, ed. 1, 1833, vol. iii. p. 126. 



X Geologia dell' Isola d'Ischia, per F. Fonseca, 1870. Firenze. 



§ " Eemarks on the Recent Geology of Italy," Trans. Manchester Geol. Soc. 

 vol. xiv. pt. xiii. 



