Frazer on Int. Cong, of Geologists. 89 
as the seat of the next Congress. M. Daubr^e gave the reso- 
lutions of the committee on the geological maps of Europe, 
adopting the scale at i — 1,500,000 and determining upon the 
places of meeting of this committee for the two succeeding 
years. The details of the report of this committee were 
thoroughly discussed. An able paper by de Chancourtois on 
the unification of coloration was read, introducing the scale of 
the spectrum,- etc. M. Uzielli added a note on the nature of 
the colors to be employed for coloring maps. 
September 30th was devoted still farther to the discussion of 
the colors to be employed in geological map making. 
October ist, 1881. The question of the rules to be observed 
in naming species was brought up. M. Fischer gave an histor- 
ical sketch of the steps taken in this direction. Hubert, Fon- 
tannes, Gillieron, Van den Broeck, Meneghini, Zittel, Dewalque, 
Emery, Renevier, Blanford, and de Moeller, took part. 
Finally the following motion was unanimously adopted. 
"The nomenclature adopted is that in which every being is desig- 
nated by a generic and a specific name." This clause was added 
to paragraph No. 2 of Douvill^ which was thereupon adopted. 
The following important resolution was also unanimously 
adopted. "In future for specific names the right of priority 
shall not be irrevocably acquired until the species shall have 
been not only described but figured." 
October 2d, 1881. The Bologna session of the Congress 
was closed. The next session was fixed for Berlin in 18S4; 
Prof. Beyrich was made President of the Committee of Or- 
ganization, and Prof. Hughes offered the hospitality of Eng- 
land for the next following session. 
In summing up what this session of the Congress had accom- 
plished, president Capellini says : Two laborious sessions have- 
been devoted to the discussion of plans for the unification of 
nomenclature; two other sessions have been accorded to the 
question of symbols. There seemed to be great difficulties iii 
our way; nevertheless we have voted several important reso- 
lutions and decided upon the execution of a map of Europe. 
Our last session has been taken up with the consideration of 
the rules to be adopted in the nomenclature of species, and we 
are justified in hoping that what we have begun here for palai- 
