210 Dr. Maton's and Mr. Rackett's 
links in the chain of organized creatures, the multiplication of 
analogies, and the tracing of changes produced in the different 
stages of the growth of animals, cannot fail to give curious and 
interesting results to the profound naturalist. The investigation of 
microscopic shells, so zealously pursued by a Plancus and a Sol- 
dani, has been taken up with no small success by 
M. M. LEOPOLD A FICHTEL 
AND 
J. P. CHARLES A MOLL, 
whose elegant and instructive work on this subject deserves par- 
ticular mention, since it is to be considered as the fullest cata- 
logue of minute Testacea that has 3 T et been published. It is em- 
bellished with beautifully coloured plates, which represent the 
several subjects both of the natural and of a magnified size. The 
descriptions are given in two languages (viz. the Latin and the 
German), and we must not omit our tribute of applause to the 
ingenious authors for having thus shown a respect for the scien- 
tific world in general, as well as for their own countrymen in par- 
ticular. It is an example which, as we have before ventured to 
remark, ought to be universally adopted ; unless the advantages 
of knowledge are intended to be purely local, like that which re- 
lates to the trade and traffic of nations; or unless it be thought 
necessary for human life to be wholly occupied in the acquisition 
of languages. The genera of Argonauta and Nautilus form the 
principal subjects of this volume; and many species appear under 
each of these which had been either not duly observed, or wholly 
unnoticed, by preceding writers. 
M. LAMARCK, 
