Ichthyologia sive opera omnia de Piscibus....omnia in hoc genere perfectiora, quam antea ulla. Posthuma vindicavit, recognovit, coaptavit & edidit Carolus Linnaeus.

After Artedi's mysterious and premature death by drowning at the age of 30 Linnaeus raised money to pay off Artedi's creditors and obtained his papers. These he published in the present five part work. The five parts are:

I. Bibliotheca Ichthyologica or Historia litteraria Icthyologiae, a chronologically arranged, annotated comprehensive analytical review of previous literature on fishes.

2. Philosophia Ichthyologica: Artedi's philosophy for establishing ichthyology as a science,

3. Genera Piscium, a classification of the fishes recognized by Artedi, containing 52 genera and 242 species.

4. Synonymia specierum, a list of names applicable to each of the species that Artedi recognized.

5. Descriptiones specierum piscium, descriptions of 71 species of fish, plus a whale that Artedi saw in London. 

Alwyne Wheeler, "Peter Artedi, founder of modern ichthyology," Proc. V Congr. europ. Ichtyol. Stockholm, 1985, 3-10. Digital facsimile from Google Books at this link.