Historical Account of Testaceohgidal Writers. 185 
concerning their natural history. A Linnean table is subjoined 
by the editors; this is too inaccurate, however, to be of use to a 
scientific student. 
But the above was not the only Testaceological work, materials 
for which were compiled by this industrious and able artist. His 
" Delicia Natures selectee" contain seven finely coloured plates of 
shells, with copious descriptions in French and German, intended 
for popular use. This volume came forth under the direction of 
Muller and de la Blaquiere, the original author having died prior 
to the time of its publication; but his name cannot fail to be re- 
membered with respect by those who devote themselves to his 
favourite pursuit, from the reflection that the useful parts of these 
elegant performances originated entirely with himself. 
In this place it will be proper to notice a compendious view of 
various systems of Testaceology written by 
DE BERGEN, 
and printed at Nuremberg in 1760. It exhibits tlie systems of 
twenty-four different authors, under the heads of " Methodi imi- 
versales" and " Methodi particular es" with concise strictures on 
each system separately. This work originally appeared in the 
Nov. Act. Ac. Nat, Cur, 
The Acta Helvetica contain two Testaceological papers from 
the pen of 
SCHLOTTERBECCIUS; 
one entitled " Observationes de Cochlea quadam ad Turbines refe- 
renda" and the other " Observatio P/n/sica de Cochleis quibusdam 
wee non de Turbinibus nonnuUis" &c. The very titles indicate the 
desultoriness of these descriptions; and the figures accompanying 
them do not supply their imperfections, except indeed some 
which are illustrative of the paper last mentioned, and which rc- 
vol. vii. 2 b we 
