206 Dr. FiTTON on the Strata below the Chalk. 



dular masses of ironstone. West of Shepherd's Chine. Near Barne's Chine: 

 in stem-like masses of pyrites. Under Barnes's High. West of Compton Chine. 



Paludinajluviorum. Sandown Bay, with Ostrea, Cyclas, and Paludina elongata : in 

 a course of stone, about 2 inches thick : also with Ct/pris Faba, in similar stone. 



Potamides ? In clay, Sandown Bay. 



Remains of Fishes. Scales of one or more species of Lepisosteus, (Lepidotus of 

 Agassiz,) apparently the same with those which are frequent in the Wealden of 

 Kent and Sussex, are found in the Weald-clay at Sandown Bay : as are also the 

 teeth, vertebrae, and other bones of some small species of fishes, at Sandown 

 Bay ; near Atherfield Point ; and at Cowleaze Chine. 



Large concretional masses with small tubular erosions on the surface, much 

 resembling those of Sandgate in Kent (13.), containing a large proportion of 

 phosphate of lime, and affording during solution the smell of CoproHte, have 

 been found at Atherfield. 



Reptiles. The toe-bone of a very large Iguanodon, found under the cliffs of the 

 Wealden strata on the shore of Sandown Bay, — and fragments of other bones, 

 probably of the same animal, found near Brook Point ?. have been described 

 by Dr. Buckland, Geol. Trans. 2nd Series, vol. iii. p. 421. 



Portions of the teeth of another Saurian, probably a Crocodile, have also been 

 found at Sandown Bay. 



Plants. Impressions of the leaves of a species of Fern : in the Wealden sand-rock : 

 at Sandown Bay, and on the east of Barnes's Chine. 



Dorsetshire. 



(103.) Isle of Purbeck. — The principal additions which I have to make, to 

 what Mr. Webster has published on the Isle of Purbeck *, are the distinction 

 of the ferruginous sands below the chalk, which contain marine fossils, from 

 the representative of the Hastings sands ; and the indication of a stratum 

 between the Portland stone and the Kimmeridge clay, which I propose to 

 distinguish by the name of the Portland sand. 



The section, PI. X. a. No. 8. represents the coast on the east of the Isle of 

 Purbeck, from the chalk at Ballard Down to Durlstone Head ; and No. 9. a 

 section near the middle of the peninsula, from the Chalk to the shore of Kim- 

 meridge-bay, of part of which Plate X. b. fig. 6. is an enlarged illustration. 

 In the coast section on the east of Purbeck the whole series from the chalk 

 down to the Portland stone is disclosed f : the Upper green-sand, Gault, 



* Letters to Sir H. Englefield ; and Geol. Trans. 2nd Series, vol. ii. p. 37 — 41. 

 f A beautiful view of this section of the Isle of Purbeck is visible with a telescope, from 

 the heights on the west of the Isle of Wight ; and reciprocally, the transverse section of the latter 



