Iii the treatise now laid before the public, the author has endea- 

 voured to give some account of the synonymous denominations of those 

 species of spiders, which are described in N. Westring's well known 

 work: Araneae Suecicos (Gothoburgi 1S61), as also of some other Eu- 

 ropean species, partly described in J. Blackwall's History of the 

 Spiders of Great Britain and Ireland (London 1861, 1864), partly 

 registered in the Catalogue synonymique des Araneides d' Europe given 

 by E. Simon in his Histoire Naturelle des Araignees (Araneides), 

 Paris 1864. — Similar remarks on the European genera of spiders 

 I have had the opportunity of communicating in a work lately pu- 

 blished: On European Spiders 1 )-, in that work, which may be con- 

 sidered as an introduction to the present investigation, I have also 

 laid down the rules for nomenclature etc., which I have here applied ^ 

 and I have expounded my views on the classification of spiders, in- 

 dicating the characteristics, by which the European families and 

 genera of this group of animals seem to me most readily and surely 

 distinguished. A catalogue of the works of systematic and descriptive 

 character treating of the European Spider-Fauna, as also of some 

 other arachnological treatises , has also been appended to that work > 

 and with respect to the works cited in the following pages, I beg 

 leave to refer the reader to that catalogue, where their titles are 

 given in full. 



As the object of this treatise is to endeavour to fix the nomen- 

 clature of the species here treated of, not to provide references to all 

 the places, where they may have been mentioned, such citations only 

 have been admitted into the lists of synonyms, as were necessary to 



1) T. Thoeell , On European Spiders. Part I : Review of the European Genera 

 of Spiders, preceded by some Observations on Zoological Nomenclature. (Nova Acta 

 Eegiae Societatis Scientiarum Upsaliensis, Ser. Ill, Vol. VII, Fasc. I et II. 

 1869-70). Also separate: Upsalise 1869—70. 



