^J^S Geological Society. 



from a definite region of a comparatively simple geological cha- 

 racter ; and this is confirmed by the palseoiitological evidence. 

 The supposition is natural that Devonian rocks were once repre- 

 sented either in the Calvados district or in some region in the same 

 drainage-area as that which has supplied the Ordovician element, 

 The Grc's de Xay of Normandy and its associated rocks are next 

 described, a massif which, according to Prof. Bonney, must have 

 exceeded the Alps in breadth. When regard is had to the extent 

 and original thickness of the Gres de May, it appears capable 

 of furnishing abundant material, not only for the Ordovician 

 pebbles of the Budleigh-Salterton Pebble-Bed, but also for a great 

 deal more. A list of species common to the Gres de May, of 

 May itself, and the Budleigh-Salterton deposit is given ; and it 

 is pointed out that in the Department of the Manche the former 

 deposit varies in palaeontological facies. In addition to the identity 

 of the quartzites and felspathic grit in the two areas, it is noted 

 that the so-called lydianstoue (tourmaline-grit) of Budleigh and the 

 Midlands may be paralleled with one referred to by MM. de Tromelin 

 and Lebesconte in the Department of Maine-et-Loire. The author 

 is struck with the resemblance of the Midland Bunter to that of 

 Devon, and he gives the percentage of rock-types in the larger 

 pebbles at Eepton and in the smaller material of Drift derived from 

 the Bunter at two localities in the Lickey Hills. Strong family 

 likenesses subsist between certain specimens in the northern and 

 southern Bunter and some of the undisturbed rocks of Xormandy. 

 A list of fossils from the Midland Bunter contains three southern 

 forms ; and a further table is given comparing fossils from Drift- 

 pebbles, from Budleigh Salterton, and from Normandy. Fourteen 

 out of twenty of the Drift and Bunter fossils are found at Budleigh 

 Salterton and in Normandy. The hypothesis which presents the 

 least difficulty appears to be that which regards the two pebbly 

 deposits, north and south, as having had approximatelj' a common 

 origin. It does not necessarily follow that both deposits are due 

 to the same river. 



2. ' Note on the Occurrence of Iveisley-Limestone Pebbles in the 

 Red Sandstone-Eocks of Peel (Isle of Man).' By E. Leonard Gill, 

 Esq., B.Sc. 



Pebbles of a coarsely-crystalline, greyish-white, mottled lime- 

 stone, collected by Prof. W. Boyd Dawkins from the conglomerates 

 at Whitestrand, contain the following fossils : — lUcenus Bowmanni, 

 var. hrevicapitatus, Primitia Maccoi/i, Orthis caUigramma, 0. testu- 

 dinco'ia, 0. biforata, Rafinesquina deltoidea, Plectamhonites quinque- 

 costata, Atrypa ea^jycinsa, Hyatella PortJocMana, Dayia pentagonalis, 

 Plati/ceras verisimile, Stenopora fibrosa, and crinoid-stems. This 

 assemblage of fossils corresponds strikingly with that of the Keisley 

 Limestone ; and it is therefore concluded that the pebbles have been 

 derived from that rock. It seems hardly likely that they have come 

 from so distant a locality as the Lake District ; more probably there 

 has been a local source, which would form a link between the lime- 

 stone of Keisley and that of the Chair of Kildare. 



