585 



(c.) Accumulations of water -worn rocks, — In every valley, with 

 the exception of that of the estuary of the Teign, are thick heaps of 

 debris, derived principally from the adjacent formations, and occa- 

 sionally containing bones of the elephant and rhinoceros. Simi- 

 lar detritus caps all the ridges which lead up to the Haldons ; also the 

 summit of those hills, Blackdown, &c. ; but the fragments are less 

 water-worn on the tops of the ridges than in the valleys. 



(c?.) The Bovey deposit is not described in this paper, the author 

 intending to prepare a separate account of it. 



(e.) Ossiferous caves. — No information is given respecting the 

 contents of the bone-caverns, Mr. Austen referring to the accounts 

 already published respecting those at Chudleigh and Kent's Hole. 



(/.) The bed of angular flints, containing in its lower part large 

 tubular and angular blocks of chert and sandstone, and resting on the 

 green sand of Haldon and Blackdown, is referred by the author to 

 the tertiary series ; and the angular form of the fragments strongly 

 distinguishes the bed from the overlying superficial debris. The 

 blocks of breccia, composed of angular flints, cemented by a very hard 

 sandstone, and scattered over the surface of the hills and along the 

 valleys, particularly near Sidmouth, are likewise considered as the 

 remains of a tertiary deposit, probably of the same age as the grey 

 wethers of Wiltshire. In the blocks near Sidmouth, Mr. Austen 

 has observed remains of shells, which he is of opinion belong to 

 the fi-eshwater genus PlanorUs, and in the Haldon beds numerous 

 individuals of the genus Cyprcea. 



Secondary Formations. — These consist of, (a.) chalk; (b.) green 

 sand ; (e.) new red sandstone ; and {d.) coal measures. 



(a.) Chalk. — The prevaiHng divisions of this formation in the 

 S.E. of England are stated to extend to Maynorst Cliff; but detached 

 masses of lower chalk are found among the debris as far west as 

 Peak Hill ; and a, white calcareous bed rests on the green sand of 

 Style Hill. 



(b.) Green sand. — This formation the author has traced along the 

 slopes of the hills flanking the valley of Bovey, where it had not 

 been noticed by previous observers. The beds dip towards and 

 form the lining of the Bovey Isasin. They rest on new red sand- 

 stone, coal measures, limestone, slate, and perhaps granite, and, to 

 a certain extent, are composed of the debris of these formations. A 

 list of the fossils is given, and Mr. Austen states, that moUusca are 

 almost wanting on Little Haldon, and he therefore infers, that the 

 Haldon beds are of a more littoral nature than those of Blackdown. 

 The conchifera also occur in single valves, and broken, and appear 

 to have been drifted as well as water-worn. 



(c.) New Red Sandstone. — The subdivisions of this formation are 

 stated to present the following geographical distribution, proceeding 

 from east to west: 1. marls, with gypsum, as far as Sidmouth ; 2. 

 sandstone, from that town to a little beyond DawUsh ; 3. shingle and 

 conglomerate, to the western boundary of the formation, the pebbles 

 being derived from the adjacent older rocks, and increasing in size 

 towards the edge of the deposit. In some places, however, the shingle 



