V. 
This is the tenth edition of the “SYSTEMA” as recognised 
by Linnzeus himself. In this edition he inserted a “ Ratio 
editionis ” in which he includes the first nine items in this 
list and the present edition, of which he states “ Holmix hae 
X. editione, longe auctius factum a me ipso.” Tt contains for 
the first time a consistent binominal system of nomenclature, 
including the generic and the trivial names, which together 
form the specific name, of each animal. A faithful reprint 
of the tenth edition was issued in 1894, through the enter- 
prise of Mr. Wilhelm Engelmann of Leipzig, and the 
German Zoological Society. 
Ed. 12. 8vo. Hale Muagdeburgicw, typis et sumtibus Io. lac. Curt. 
1760. “Preefatus est Joannes Joachimus Langius ad 
editionem decimam reformatam Holmiensem.” 
This edition of Volume I. is page by page the same as the 
10th Ed., 1758, but has a few misprints. 
Ed. 13. [Linneus’ 11th] 8vo., Leipsiz, 1762, 2 vols. ‘A mere 
speculation of a greedy bookseller, without additions, and 
XI. abounding with errors” (Stoever). Linnzeus himself says ot 
this edition, which he recognised in his “ Ratio editionis” in 
the XIIth edition as the eleventh ; “furtim prodiit vitiosa. 
Nil additum.” 
Ed. 14. Tomi II, pars 1, et IIL, pars 1, Hague, 1765, folio. ‘“Anglice 
Gallice, et Belgice, non illud illustris viri opus, sed vera fraus 
bibliopolarum ; incones male, cum nominibus alienissimis, et 
tanta inscitia, quantum hoc nostro w#vo nunquam exspec- 
tassem.” Haller, Bibl. Bot. t.ii., p. 552. 
Kd. 15. [Linneus’ 12th] 8vo. Holmiw, vol. I., pars 1, 1766, 532 pp.; 
Vol. L., pars. 2, 1767, pp. 533-1327, with indices and addenda ; 
Vol. IL, Regn. Veget., 1767; Vol. IIL, Regn. Lapid., 1768. 
XH. Impensis Direct. Laurentii Salvii. — “ Editio Duodecima, 
Reformata.” he twelfth edition of the “SYSTEMA ” 
recognised as such by Linneus himself in his “ Ratio 
Editions,” ‘“ Holmensi hae propria ultima penultimaque 
editione,” and the last edition revised by Linnus himself, 
The present work supplies an index to the Xth and XIIth 
editions (1758-1759, and 1766-1768) of the “SYSTEMA NATURA,” 
and is intended to show the place of every species-name in each 
edition, both as to genus, and as to the page of the volume where 
it occurs. 
For many years, the twelfth edition, 1766-1768, was the basis 
of zoological nomenclature in accordance with the Report of the 
Committee on Zoological Nomenclature of the British Association, 
which produced the Stricklandian Code. But recently a strong 
feeling has arisen, more especially in the United States, that the 
