27 



which has in great measure been supplied by a presen- 

 tation from Mr. and Mrs. Wright, containing specimens 

 of the whole of the medial and supermedial orders, and 

 when it is known that this collection was made by the 

 Secretary of the Geological Society, its value will be duly 

 appreciated by the members. 



The same department has been assisted by a valued 

 coadjutor, Gideon Mantell, esq. of Lewes, whose discovery 

 of the fresh water beds inclosing the remains of Saurian 

 animals of gigantic extent, will render his name sacred, in 

 conjunction with the illustrious Cuvier in this pleasing and 

 intricate science. Great interest will also be attached to 

 the beautiful collection of fossils from the neighbourhood 

 of Grignon ; they were presented by the Rev. G. R. 

 Leathes, of Shropham Hall, Norfolk, and collected wholly 

 by him during a scientific excursion in the past season. 

 The perfect state of preservation in which shells from this 

 neighbourhood are found (every line and marking being 

 complete), will ever render the fossils of these strata ob- 

 jects of interest in museums. The Green-Sand fossils 

 (many of which are undescribed) were obtained by some 

 exchanges with Mr. Hills, of Courtup-street. 



Many new Shells have been placed in the cases devoted 

 to Conchology illustrative of the Linnajan"arrangcment, and 

 a new case has been added for the purpose of exhibiting 

 a single specimen of each of Lamarck's classes, families, 

 and genera. This will prove a valuable reference for all 

 students in geology and conchology, as it illustrates the 

 system generally adopted by the continental writers on those 

 subjects. Many of the rarer specimens are presents to 

 liie society, expressly for the purpose, by the Rev. G. R. 

 Jxathcs. The Society is also much obliged to Mr. 

 Thornton, of Chcsliunt, for a pair of splendidly polished 



