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ledge of the fossil insects of the British formations of this period, 

 I must not omit to mention those of Professor Buckman, Messrs. 

 W. R and H. Binfield, Professor Morris, F.G.S., Dr. Mantell, 

 F.R.S., Professor Edward Forbes, F.R.S., Mr. W. E. Brodie, Mr. 

 C. Wilcox, the Eev. O. Fisher, Captain Woodley, the Eev. Dr. 

 Buckland, F.E.S., the Eev. J. H. Austen, the Eev. E. F. Witts, 

 Mr. H. E. Strickland, F.G.S., Mr. Arthur Gardiner Butler, F.L.S., 

 Mr. S. H. Scudder, Mr. E. T. ffiggins, &c. 



The British formations of this epoch, in which insect 

 remains have as yet been discovered in the greatest number, 

 are the upper series of the Upper Oolite {i.e., the Purbecks) 

 and the Lias. The only other formations of the period 

 in which they appear to have been yet discovered in this 

 country are the Hastings sands, and some other subordinate 

 members of the Wealden system, the Kimmeridge clay of the 

 Up2)er Oolite, the Oxford clay of the Middle Oolite, the Forest 

 Marble, Great Oolite, and Stonesfield Slate of the Lmoer Oolite ; 

 and the Ehcetic series between the Lias and the Trias. As yet no 

 remains have been recorded from the British upper cretaceous 

 system, the upper members of the lower cretaceous, or Neocomian 

 system, the Portland stone and sand, coral rag, Kelloway rock, 

 Combrash, Fuller's earth and inferior Oolite, or from the Trias. 

 It is needless to say that one must not infer that because no insects 

 have as yet been discovered in these strata, none existed at the 

 different geological epochs of their deposition. Either they have 

 been overlooked, or their absence may be accounted for by the fact 

 that as these formations are of marine origin, the circumstances 

 attending their deposition were unfavourable to the preservation 

 of the insects of the period, and that, consequently, we have few or 

 no traces of them. Although, as I have observed in my first paper, 

 the presence of insects in marine formations may in some cases 

 be accounted for by supposing them to have been driven by the 

 wind into the sea when in its neighbourhood, or when attempting 

 to cross it, yet, as a rule, where their remains have been detected 

 in any abundance in decidedly marine formations, this may generally 



