Cxlii PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



Before-described 



Species. New Species. Total. 

 Jurassic or Lower Secondary ... . 44 .... 16 .... 60 

 Cretaceous or Upper Secondary. . 106 .... 11 .... 117 



Older Tertiary 24 24 



Newer Tertiary 52 .... 33 .... 85 



It is somewhat remarkable that 0*26, or above ^th of the 

 lower secondary, and *39, or above -J-rd of the newer tertiary, are 

 new fossils, whilst in the upper secondary less than -^th are new, 

 and in the older tertiary no new fossils at all were discovered. I do 

 not draw from this circumstance any other conclusion than that 

 much more must be done before a perfect correlation of the strata can 

 be effected : and I cannot help hoping that all the specimens will be 

 hereafter carefully drawn and published ; for it is almost impossible 

 to determine the identity of those which have been compared only 

 with the figures of foreign works, without having carefully-executed 

 plates to examine ; and it is to be hoped that hereafter the museum 

 in Jermyn-street will become complete in typical series of specimens 

 with which all foreign specimens may be collated. Several other 

 military names are mentioned as having been contributors of the 

 specimens, such as Lieut. -Col. Munro, Major Anderson, R.A., Major 

 Cooke, E.E., Major Hudson, 39th Regiment, Dr. Sutherland, Dr. 

 McPherson, and Mr. Olver. Many of these names have been given to 

 the new species ; and I would have been happy to relinquish the 

 honour conferred in one instance upon me, in favour of some of the 

 others. 



The judicious remarks with which Mr. Baily concludes his paper 

 show an alternating approximation to and divergence from the 

 British types. Thus, for example, in the lowest division there is a 

 close approximation to our Lias, whilst there is a considerable diver- 

 gence from the Oolites. In the Cretaceous group there is again a 

 tolerable resemblance to the several British divisions ; and even in 

 the Lower Tertiaries there is some ; whereas the Middle or newer Ter- 

 tiaries, constituting the Steppe Limestone, and forming one of the 

 most important members of the whole series in the Crimea, are very 

 distinct from the British Tertiaries in fossils, and are believed to have 

 formed part of the deposits of the great Aralo-Caspian Sea, which 

 was probably even larger than the present Mediterranean. 



Mr. Baily has turned to good account the opportunity afforded 

 him by Capt. Cockburn ; and I trust Capt. Spratt, and Dr. Abich, 

 who is also engaged in this interesting research, will bring these 

 observations into comparison with their own, and by their continued 

 labours assist in rendering the whole complete. 



Permian and Trias. — Every day's experience has added fresh 

 proof of the difficulty of accurately discriminating between detritic 

 formations when in close contact with each other ; and it may be 

 fairly said that it would never have been possible to allot to the 

 Magncsian Limestone of England its true place in geological classi- 

 fication, had not Sir Roderick Murchison discovered in Russia all the 



