[Transcriber's note: Spelling (including typographic errors) in the original has been preserved without correction, for instance on one occasion umbrella replaces umbella. This HTML document contains URL fragment identifiers of the form #Agenus and #Agenus_aspecies, in all such URLs the rendering of taxonomic names conforms to current standards. Although the title page bears the date 1788, the work was issued in parts beginning with the text and first plates in 1789; further sets of plates were issued up to 1792; plates 35 to 43 were never published. At some time early in the 19th century the work was re-issued, still with date 1788, but with type reset to 20 pages and lacking the astronomical symbols.]

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