EXPLANATION OF THE SYSTEM OF ENTRIES ADOPTED, 
AND OF ABBREVIATIONS. 
The entries in the Index are of two kinds, viz. : — 
(1) As regards names given in the volumes of the “ Zoological Record ” 1880- 
1900, this class is distinguished by the absence of a semicolon from the entry. 
The volume of the Record is indicated by the date, which is given in an 
abbreviated form : ’95 meaning the volume for the year 1895. After the date 
follows the division of the Record — “Mamm.,” for instance. This method is 
rendered necessary by the fact that the volumes of the Record have no pagina- 
tion continuous from beginning to end, each division of the record having its 
own pagination. The entry “ Aachenosaurus, Smels, ’88, Rept. 17,” is thus an 
abbreviated form of “ Aachenosaurus, proposed by SmetSj and registered in the 
volume of the Record for the year 1888, Reptilia, p. 17.” By far the larger 
number of entries are of this kind. The date given is not necessarily that of the 
proposal of the name, neither is the Class of animals indicated necessarily that to 
which the animal really belongs. We may, however, point out that the date of 
the volume is usually the same as the year in which the name was proposed,* 
and that the Class of animals is nearly always correctly indicated.! 
(2) The second kind of entry comprises all names that are not included in the 
“ Zoological Record.” These names have been derived from a great variety 
of sources, and the information accompanying them is sometimos inadequate. 
These entries always have a semicolon. The mode in which they are drawn up 
is intended to make them as comformable as may be with the more numerous 
entries of the first kind. The reference accompanying them is sometimes a 
direct one, but more frequently is indirect, i.e. only the clue to where an 
explanation of the name may be found is given. These clues are included in 
square brackets. 
Most of the abbreviations of titles of periodicals are those used in the 
“ Zoological Record,” and recorded in the list of abbreviations issued with each 
volume, and do not therefore require explanation here. The following notes will 
explain the abbreviations we have not already dealt with : — 
* The discrepancy of date when it occurs is frequently only of one year, but may 
be of two or more years. The most important of the discrepancies created by this 
secondary mode of indication is in the case of Foerster’s genera of Hymenoptera 
which were proposed in 1869 or 1870, though only inserted in the Record for 1888. 
f The indication of class is sometimes inexact or incorrect in the case of fossil 
forms that were imperfectly interpreted when described and named. 
