268 



THE GEOLOGIST. 



The great Dinosaurian lizards have not been met with higher than the 

 Greensand beds, — unless a large undetermined bone in the Folkestone 

 Town Collection, collected by the author, should prove to belong to some 

 great Iguanodon. 



To these notes which we have made in the hope of drawing the atten- 

 tion of collectors, at this genial season, and of gathering information of 

 new or unrecorded specimens, in private cabinets and local museums, we 

 may usefully add a record of the specimens in the British Museum. These 

 are in the table-cases : — Femur of Trionyx ?, from the Chalk of Rochester, 

 collected by Mr. Bensted (and figured in ' Geologist,' Vol. V. p. 296) ; 

 two large teeth of Polyptychodon ?, with fragments of cellular bone, from 

 the Grey Chalk of Dover? ; jaws, loose teeth, humerus, vertebras, wing, 

 and bones of Pterodactyles, from Upper Greensand of Cambridge ; and a por- 

 tion of very large wing-bone of Pterodactyle, from the Gault of Folkestone ; 

 beaks and other bones of Chelone altimentum, Chelone depressimentum, and 

 possibly of other Chelonians, from the Upper Greensand of Cambridge ; very 

 fragmentary tooth, without the enamel, of perhaps Pliosaurus ?, from the 

 Lower Chalk of Sussex (Mantell Collection) ; teeth of species of Piesio- 

 saurus, from the White Chalk of Southerham, Sussex, and the Wealden of 

 Til gate Forest ; teeth of Ichthyosaurus campylodon, from the Chalk of 

 Islesham, and Lower Grey Chalk of Dover ; also some from the Gault of 

 Folkestone, and Upper Greensand of Cambridge, from which last deposit 

 are also some worn vertebrae ; teeth of Polyptychodon interruptus, from 

 the Sussex White Chalk (Dixon Collection), the White Chalk of Rochester, 

 Kent ; from Steyning, in Sussex (Mantell Collection) ; (? sp.) two specimens 

 in hard chalk, from Kent (Taylor Collection) ; (? sp.) from the Folkestone 

 Gault ; and numerous teeth from the Upper Greensand of Cambridge. 

 From the Wealden, Suchosaurus cultridens, Owen, Tilgate Forest (Man- 

 tell Collection) ; Goniopholis crassidens, Owen, Tilgate Forest, Sussex 

 (Mantell Collection) ; Coniosaurus — jaw and isolated teeth of C. crassidens, 

 Owen, from the Chalk of Washington, near Worthing (Dixon Coll.). In the 

 Saurian wall-cases are fine jaws with teeth and large vertebras of Ichthyo- 

 saurus campylodon, Carter, from the Grey Chalk of the Round Down 

 Tunnel, on the South-Eastern Railway, near Dover ; and teeth and verte- 

 bras of Icthyosaurus campylodon ?, from the Cambridge Upper Greensand ; 

 vertebras of a Wealden Plesiosaurus in sandstone from Tilgate Forest 

 (Mantell Coll.). 



Of Chelonians in the wall-cases are the fine remains of Chelone Ben- 

 stedi, found in the Lower Chalk of Burham by Mr. Bensted, and given 

 by him to Dr. Mantell, and some fragments from the Chalk of Lewes and 

 Rochester ; numerous remains of Chelone Mantelli, from the Wealden of 

 Tilgate Forest (Mantell Coll.) ; and of Platemys Dixon i, Owen, from the 

 same locality (Mantell Coll.). 



Of the Great Lacertians in the wall-cases are a fine fragment of upper and 

 lower jaws, with teeth, of Mosasanrus gracilis, Owen, from the Lower Chalk 

 of Burham (Taylor Coll.) ; two vertebras of the same species from the Up- 

 per (?) Chalk of Lewes ; and isolated teeth of Mosasanrus (sp. ?) from the 

 Norwich Chalk (Mantell Coll.) ; and the Egerton specimen of Dolichosau- 

 rus longicollis, from the Grey (not Lower White) Chalk of Kent. 



We would here only add that the species of which, more than any other, 

 it is particularly desirable to get further evidence, both as to its nature, 

 size, and geological zone, is the Dolichosaurus longicollis, of the specimen 

 of which in Mrs. Smith's collection we give a figure in Plate XIV. 



S. J. Mackie. 



The Mines of Tuscany. — The working of mines in Tuscany dates from 



