Historical A ccount of Testaceological Writers. 1 87 
discovery had augmented the number of known species to a won- 
derful degree ; and from remarking the large portion of the chain 
of organized life occupied by these creatures, naturalists were ne- 
cessarily led to turn their attention to facts as well as to names, 
and to presume that many curious and important analogies, illus- 
trative of the phenomena of life and sensation, might be col- 
lected from an examination of the structure and habits of so ex- 
tensively varied a tribe. In the Mem. de V Acad, des Sciences (a 
work which we have so frequently had occasion to mention with 
respect, as a repository of information highly valuable to theTes- 
taceologist) we. find a paper entitled " Eclair cisscmens sur VOrga- 
nization jusqu ici inconnue (Sunt Quantite considerable de Productions 
Animates, principalement de Coquilles des Animaux" by 
HERISSANT, 
who has subjoined to it eight excellent plates, three of which re- 
late entirely to shells, and the other five to Madreporce, Sec. The 
matter is not wholly original; but, when we mention that it occu- 
pies upwards of thirty pages, it will naturally be imagined that 
the reader may derive advantage from its perusal : there are cer- 
tainly many facts and speculations which have not less merit for 
their novelty than for the utility of their application. 
The extensive collection of natural curiosities formed by 
M. DAVILA 
is described in three octavo volumes. The first of these relates 
to the Testaceological part of the collection, which is treated of 
pretty conformably to the Linnean system, but wholly in French* 
and divided into three distinct portions, viz. " Coquilles de Mer, 
d'Eau douce, et terrestres" There are twenty-two excellent plates, 
containing several species never before figured, and in a great 
2 b 2 measure 
