388 Geological Society. 



thick masses of calc-rnica-schists, with which green schists (actino- 

 litic) are as usual associated, no doubt intrusively. All these 

 represent types common in the Alps. The author discusses the 

 relations of the magnetite and serpentine, which, in his opinion, 

 cannot he explained either by mineral change or by differentiation 

 in situ, but indicate that a magnetitic must have been separated 

 from a peridotic magma at some considerable depth below the 

 surface, and the former, when nearly or quite solid, must have 

 been brought up, fragment-like, by the latter; as in the case of 

 metallic iron and basalt at Ovifak (Greenland). 



'2. ' The Elk (Alces macJdis, Gray) in the Thames Valley.' By 

 Edwin Tulley Newton, Esq., F.K.S., E.G.S. 



3. • Observations on the Tiree Harble, with Xotes on others from 

 Iona." By Ananda K. Coomaraswamy, Esq., B.Sc, E.L.S., F.G.S. 



The gneiss near Balephetrish has a general south- westerly and 

 north-easterly trend, and the limestone occurs in it as lenticles 

 of various sizes, having a similar foliation. Descriptions of pink, 

 grey, and white varieties of the limestone in this locality are given. 

 The inclusions comprise those of gneiss containing quartz, felspars, 

 hornblende, augite, scapolite, and sphene as characteristic minerals, 

 and mineral-aggregates consisting of sahiite, coccolite, scapolite, 

 sphene, apatite, calcite, and mica. The contact-phenomena are not 

 specially well displayed, but several instances are described; and in 

 these the minerals of the modified gneiss interlock with those of the 

 modified limestone, and there is no actual line of junction seen 

 under the microscope, although an abrupt change is evident. The 

 dynamic phenomena include the rounding of the minerals (frequently, 

 however, an original character) and the formation of ' augen.' The 

 carbonates are present as a fine-grained granular matrix, the result 

 of the breaking-down of larger grains, probably at a temperature 

 not above 300° C, as indicated by the experiments of Adams & 

 Nicolson. Although there are exceptions, gneiss-inclusions and 

 mineral aggregates have usually been protected from the effects of 

 extreme pressure. The description of minerals includes carbonates, 

 pyroxene, amphibole. forsterite, scapolite, sphene, mica, apatite, and 

 spinel. White, greenish, and black marbles are described from Iona, 

 where they are associated with actinolite-felspar schists and others ; 

 they are included in the gneiss. Sedimentary rocks suggestive of 

 Torridon Sandstone occur along the eastern shore of Iona. 



January 7th, 1903.— Prof. Charles Lapworth, LL.D., E.R.S., 

 President, in the Chair. 



The following communication was read : — 



1 On the Discovery of an Ossiferous Cavern of Pliocene Age at 

 Dove Holes, Buxton (Derbyshire).' By William Boyd Dawkins, 

 M.A., D.Sc, E.P.S., F.G.S., Professor of Geology in Owens College, 

 Victoria University (^Manchester"). 



