In the Press, price, to Subscribers, Eighteen Shillings, 



THE NATURAL HISTORY 



INFUSORIA; 



WITH AS ABRWGEiir.ST OF 



Bit 3nfu£f!on$t0trrr&rn 



OF 



C. G. EIIREXBERG. 



ILLUSTRATED BY ENGRAVINGS OF ALL THE GENERA GIVEN IX THAT WORK IND 

 ORIGINAL DRAWINGS OF FOSSIL INFUSORIA, 



BY F. BAUER, Esq., F.R.S. 



BY ANDREW PRITCHARD. 



In announcing to the public a new Work on Infusory Animalcules, some explanation 

 may be required, why the Author has departed from the system of arrangement given 

 in his "Natural History of Animalcules," published in 1834; the more especially, 

 after the very nattering reception that publication met with, not only in England, but 

 throughout Germany and France. At the time that Work was being prepared, in 

 which the arrangement is that of F. O. Muller, founded on the external characteristics 

 of these minute creatures, Dr. Ehrenberg's, derived from their internal organization, was 

 not complete; and drawings of 19 species only had appeared in this country. Hence 

 it was, that the Author adopted the former ; the latter is now preferred ; notwithstand- 

 ing which the opinions of naturalists opposed to it will be fairly stated. 



Although descriptions of every known species will be given, it is not intended that 

 the forthcoming Work shall be merely a catalogue of dry and technical specifications j 

 for it will contain so many curious and interesting particulars respecting the extraordi- 

 nary forms, internal organization, locomotion, habits and instincts of these wonderful 

 creatures— together with the best methods of procuring and examining them under 

 the microscope— which, it is hoped, will render the Work as complete a History, as up 

 to this period it can possibly be made. 



The recently-discovered Fossil Remains, as incorporated with the Flint, or heaped 

 together in countless myriads, forming vast beds or mountains on the surface of our 

 globe, will also be brought under review; and the whole illustrated by Engravii 

 SEVERAL HUNDRED INFUSORIA, highly magnified. 



In translating and abstracting so technical and extensive a Work as the "Die 

 Infusionsthierchen," occupying, as it does, nearly COO large folio pages, many diffi- 

 culties would necessarily arise ; these, however, by the great assistance which has linn 

 rendered him, the Author has been able to surmount; and it is believed, thai whilst, 

 on the one hand, this Work will be disencumbered of long lists of synonymes and his- 

 torical references, so, on the other, it will comprise all those important discoveries, 

 which, as the arrangement depends upon them, it would be unjust and unwise to have 

 omitted. 



With respect to the Engravings, on the execution of which the value of the Work 

 will so greatly depend, few words only need be Baid; since the Author's long c\- 



ice, and the high character attained already by the Illustrations of bis ' 

 Works, will he the best guarantee of what lie is' likely to produce. It may b( 

 however, to state, that the Examples of Genera will be entirely selected from the mag- 

 nificent Engravings of the "Die Infusionsthierchen;" and thai the Illustrations i 

 Fossil Infusoria, discovered since Ehrenberg's Work was printed, are from the handoi 

 F. Bauer, Esq., a gentleman whose skill in this exquisite art is beyond all comparison. 

 Thus, on the whole, it is presumed, that the Engravings of this Work will sun 



accuracy, finish and colouring, all that have yet appeared : and the Author i 

 enough to hope, that the Manual will take its place as the Standard English W( 

 this interesting branch of .Natural History. 



Subscribers' Names received at 162, Fleet Street, London. 



