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 etabli les vrais prin- 

 cipes qu'on doit suivre dans I'etude et la determination des co- 

 quilles, et qu'il a pos6 les bases de cette interessante partie de 

 nos connoissances." (Mem. de la Sac. d'Hist. Nat. p. 63.) 



Having made these general remarks on the Testaceological part 

 of Linnaeus's Systema, Ave 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, Avith their 

 synonyms at full length. In the second edition, which came 

 forth in I76I, 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, hoAvever, that neither the 

 Museum Tessiniamim nor the Museum Adolphi Friderici Regis con- 

 tain descriptions or figures of more than three species of Tes- 

 tacea. They are Avorks of much splendour, in point both of typo- 

 graphy and engi'aving, but afford very little assistance to the hel- 

 minthologist. In the description of another Museum (that of the 

 queen of SAveden) Linna-us made ample amends for his brevity 

 in that of the former; and her SAvedish majesty's collection being 



3 A 2 particularly 



