282 Reports and Proceedings — 



genus largely from these foreign forms. The author, in the light 

 of the information now supplied, gives a fresh definition of the 

 genus, which appears to represent a distinct family of perforate 

 corals, in some features more nearly allied to the Favositidaa than to 

 the Madreporidae or Poritidas. 



(3) The third specimen was discovered by Miss Margery A. Eeid 

 in the Lower Cai'boniferous Beds of Halkin Mountain, Flintshire, 

 and is named in honour of its discoverer. A description of it is 

 given, and it is stated that, notwithstanding certain peculiarities, 

 the individual pieces correspond so closely with those of the recent 

 Eunice family that it may well be included in the genus Eunicites. 



2. "The Eocene Deposits of Dorset." By Clement Eeid, Esq., 

 F.L.S., F.G.S. (Communicated by permission of the Director- 

 General of H.M. Geological Survey.) 



The new survey of the western end of the Hampshire Basin 

 shows that the Beading Beds become fluviatile and gravelly in 

 Dorset (as was already known), and contain, in addition to Chalk 

 flints, many fragments of Greensand chert. The London Clay thins 

 greatly and becomes more sandy, but is apparently still marine. The 

 Bagshot Sands become coarser and more fluviatile, changing rapidly 

 west of Moreton Station, till they consist mainly of coarse subangular 

 gravel. These gravels, formerly referred to the Reading Series, are 

 now shown to be continuous with the Bagshot Sands, which as they 

 become coarser cut through the London Clay and Beading Beds to 

 rest directly on the Chalk. The Bagshot gravels contain, besides 

 Chalk flints and Greensand chert, fragments of Purbeck marble and 

 numerous Palaeozoic grits and other stones probably derived from 

 the Permian breccias of Devon. 



Thus there is evidence of disturbance and overlap in Cretaceous 

 or eai'ly Eocene times, causing Beading Beds to rest on Upper 

 Greensand. Later disturbances allowed the Bagshot river to cut 

 into Greensand, Wealden, Purbeck, Permian breccia, Culm Mea- 

 sures, and granite. Folding of the strata seems to have taken 

 place during at least four different periods in the district between 

 Dorchester and Weymouth, which appears to have been a region of 

 special weakness. 



The Eocene gravels contain all the foreign rocks known to occur 

 in the Plateau-gravels between Brighton and Dorchester. The 

 fragments of Greensand chert, so abundant in the Plateau-gravels, 

 have not been derived, as supposed, from the central axis of the 

 Weald. They come, as already-formed pebbles, from the Eocene 

 of Dorset, and originally from the Greensand of Devon. 



3. " Discovery of Mammalian Remains in the Old River-gravels 

 of the Derwent near Derby." — Part I. By H. H. Arnold-Bemrose, 

 Esq., M.A., F.G.S. 



A few mammalian bones were found in sinking a well at Allenton. 

 On April 8th, 1895, the authors commenced further excavations, 

 and were successful in finding the lower jaw, 26 vertebra?, the os 



