19 
LINN^US was busy at that time preparing the first 
edition of his "Sy sterna Naturae". ARTEDI was able to 
give him as a contribution to that work a survey of 
his own system of classification of Fishes, including de- 
tailed descriptions of the different genera and, further- 
more, an intimation of the classification of the Um- 
belliferse, which he had devised with special reference 
to the occurrence of the involucrum, a classification 
which he hoped to work out more thoroughly when 
he should have completed his labours upon Fishes. As 
soon as LINN.EUS had had time to incorporate these con- 
tributions in his own work, the two friends betook 
themselves to Amsterdam and waited upon SEBA. The 
result of the interview was, that ARTEDI undertook, "on 
the promise of a fair and honourable remuneration", 
to deal with SEBA'S collection of fishes. He set to work 
at once to write descriptions of genera and species, and 
to investigate the synonymy, the work making excellent 
progress under his hands. 
LINNAEUS, after the introduction of his friend to 
SEBA was accomplished, returned naturally to his own 
labours at Leyden and Hartecamp, but had no sooner 
got his "Fundamenta Botanica" finished, than he ex- 
perienced a great desire to resume personal intercourse 
with ARTEDI as in the old days at Upsala, that he might 
consult him and hear his advice and suggestions. Armed 
with his newly completed work, therefore, he jour- 
neyed to Amsterdam to lay it before ARTEDI. His re- 
ception there was as cordial as ever, the visit proving, 
indeed, very opportune and welcome, inasmuch as AR- 
TEDI, too, had a work ready to submit to his friend's 
approval, his "Philosophia Ichthy elegise", which he pro- 
ceeded to read aloud from beginning to end. LINNAEUS 
tells us ! , "Though anxious to get to work at other tasks, 
I was not allowed to depart until I had looked through 
all his ichthyological works and communicated to him 
those criticisms which occurred to me concerning the 
1 In the above-mentioned Introduction to ABTEDI'S "Ichthyo- 
logia". 
