194 Dr. MatOxVs and Mr. Rackett's 
habiting that country, with the names by which they are therein 
vulgarly designated, as well as those which serve the purposes of 
system. The Testacea are arranged under thirty-six genera, of 
which ten are of our author's own construction, and derived from 
his peculiar method of arrangement; the others agree with the 
Linnean classification. 
This work was followed a year afterwards by the first fasciculus 
of his " Animalium Danice et Norvegice rariorum ac minus notorum 
Icones" 
The Zoologia Danica was completed in 1779- It describes at 
considerable length all the new and most remarkable species; and, 
agreeably to the author's scheme of Testaceological arrange- 
ment, the contained animals are not less minutely noticed than 
their shells. The Icones were re-edited in 1781 in the same vo- 
lume with a folio history of the species which they represent; 
forming, in fact, the Danish Zoology. We cannot conclude our 
account of Midlers labours on the subject of the Testacea, without 
expressing our admiration of the fidelity and perseverance with 
which he has added to our knowledge of that order of animals. 
No observer has hitherto done so much towards rendering us fully 
acquainted with their structure and oeconomy ; and though, as 
the basis of a system, his researches are not susceptible of so 
useful and general an application as the more artificial method of 
Linnaeus, they cannot fail to be of permanent importance to the 
common stock of natural science. 
FORTIS, 
the Dalmatian traveller, has given a few good figures of Testacea, 
to illustrate the description of those species which he found in the 
Porto di Bua. 
FORSKAHL, 
