Reports and Proceedings — Oeological Society of London, 139 



from the actual bones out of tlie Oxford Clay near Peterborough, 

 obtained by Mr. A. N. Leeds ; the fine series of Ichthyosaurs and 

 Plesiosaurs on the walls ; the reproduction of the Bernissart Iguanodon 

 from Belgium , in the centre of the gallery ; and lastly, the reconstructed 

 skeleton of Polacanthus Foxii, an armed reptile from the Wealden of 

 the Isle of Wight (see Geol. Mag., June, 1905, p. 242, Plate XII), 

 make up a most attractive and striking display of Mesozoic 

 Keptilian life. 



The Fish Gallery has always been a magnificent exhibition, and 

 is still unsurpassed by any other in the world. In addition to all 

 his other work Dr. Arthur Smith Woodward has spent 13 years in 

 the production of four large volumes on the series of Fossil Fishes, 

 covering 2,393 pages of text, with 138 text illustrations and 70 plates, 

 including a large number of very beautiful outline restorations of 

 special genera. The latest wonder is a tail of the gigantic Zeedsia 

 prohlematica, from the Oxford Clay of Peterborough, mounted on the 

 east wall between eases 13 and 14. It has a span of 9 feet, and 

 probably represented a fish 30 feet in length! The series of remains 

 of giant armoured Devonian fishes from Ohio of the genus Dlnichthys 

 deserve to be specially mentioned, and the nearly complete examples 

 of sharks, Cladoselache, from Cleveland, Ohio (also of Devonian age)^ 

 some of which were 5 to 6 feet in length, showing the jaws with 

 teeth, the paired fins and tail, with the outline of the body. 



Another group of curious Palseozoic sharks, with a coiled up series 

 of teeth (to which the genus Edestus Davisii belongs, see figure and 

 description, Geol. Mag., 1886, p. 1, Plate I), has been discovered by 

 Professor Karpinsky in the Permo-Carboniferous of Perm, Eussia,. 

 having a coil of teeth so symmetrically arranged as to present 

 a close resemblance to an Ammonite or other discoidally coiled 

 fossil shell. 



We wish that space permitted a longer notice, for the collections 

 here described and illustrated so profusely in this little Guide, deserve 

 to be even more widely known than they are; but such excellent 

 handbooks, at so small a price, are sure to attract students ; even 

 the ordinary visitor, more bent upon pleasure than instruction, 

 cannot fail to be delighted and amused and take away with tho 

 book some grains of knowledge. But it is especially for the young 

 that these beautiful guidebooks are intended, and we hope the 

 pictures may prove an attractive bait to many boys and girls wha 

 may thus turn out to be the geologists of the future. 



JaS^'OIRTS .^ISTJD IPS-OGIBIBlDin^Ca-S. 



Geological Society of London. 



L— January 24th, 1906.— J. E. Marr, Sc.D., F.E.S., President, 

 in the Chair. The following communications were read : — 



1. " On the Igneous and Associated Sedimentary Eocks of 

 Llangynog (Caermarthenshire)." By T. Crosbee Cantrill, B.Sc.;. 

 and Herbert Henry Thomas, M.A., F.G.S. 



