Frazer on Int. Cong, of Geologists. 91 
III. Rules for establishing a notnenclahire of species. 
1. The nomenclature adopted is that in which every being 
is designated by a generic and a specific name. 
2. Each name is composed of a single Latin or latinized 
word, written according to the rules of Latin orthography. 
3. Species may present a certain number of modifications 
related to each other in time or in space, and designated respec- 
tively under the name of "mutations" or "varieties;" the mod- 
ifications of which the original is doubtful are simply called 
*' forms." 
The modifications shall be indicated, when there is occasion, 
by a third term, preceded (according to the case) by the words 
variety, mutation, or form, or by the corresponding abbrevia- 
tions. 
4. The specific name should aWays be accompanied by 
the indication of the name of the author who has established it; 
that of the author placed in parentheses when the primitive 
generic name is not preserved, and in this case it is useful to 
add the name of the author who has attributed it to a new 
genus. This same disposition is applicable to varieties erected 
into species. 
5. The name attributed to each genus or to each species is 
that under which they have been longest designated, provided 
that the characters of the genus and of the species have been 
published and clearly defined. Precedence shall not go back 
further than the 12th edition of Linnaeus, 1766. 
6. In future, for specific names, priority shall not be irrevo- 
cably acquired until the species shall have been not only de- 
scribed but figured. 
Following the accomit of the proceedings of the second Con- 
gress is a description of the collections and models offered to the 
inspection of its members, and the lectures and communications 
presented during the Bologna meeting. 
There are "Macrographic classification of the trachytes of 
Hungary," by Szabo; "Classification of the old stratified for- 
mations of the island of Sardinia," by J. S. Bornemann; with 
two plates and three figures. "On the Cretaceous terrane of 
the great dunes of sand of northern Sahara," by M.J. Rolland; 
* The geology of New South Wales," by G. S. Wilkinson; 
m 
