Historical Account of Testaceological Writers. 179 
bouring country ; in which if, after almost unprecedented pains 
had been taken, both by himself and by an indefatigable con- 
temporary, for the formation of a perfect system, the principles 
of Linnaeus remain unimpaired, we may fairly relinquish the ex- 
pectation of being presented with any less exceptionable. " On 
peut dire," says M. Lamarck, " que Linne a 6tabli les vrais prin- 
cipes qu'on doit suivre dans l'etude et la determination des co- 
quilles, et qu'il a pose les bases de cette interessante partie de 
nos connoissances." (Mem. de la Soc. d'Hist. Nat. p. 63.) 
Having made these general remarks on the Testaceological part 
of Linnaeus's Syste?na, we shall proceed to notice such other of 
his works as relate to this branch of natural history. The first of 
these in order of time (and certainly not the last in point of value) 
was the Fauna Suecica, originally published in 1746, and con- 
taining sixty species of Testacea admirably described, with their 
synonyms at full length. In the second edition, which came 
forth in 1761, the number of species discovered to be natives of 
Sweden was augmented to eighty-nine, and the genera exhibited 
the improvements adopted in the 10th edition of the Systema. 
But, prior to the appearance of the improved Fauna Suecica, the 
author had described the cabinets of the king of Sweden and 
count Tessin, the contents of which had, no doubt, furnished him 
with new hints towards perfecting his method in every branch of 
natural history. It is to be lamented, however, that neither the 
Museum Tessinianum nor the Museum Adolphi Friderici Regis con- 
tain descriptions or figures of more than three species of Tes- 
tacea. They are works of much splendour, in point both of typo- 
graphy and engraving, but afford very little assistance to the hel- 
minthologist. In the description of another Museum (that of the 
queen of Sweden) Linnaeus made ample amends for his brevity 
in that of the former; and her Swcdisli majesty's collection being 
2 a 2 particularly 
