CARD CATALOGUES AND THEIR APPLICATIONS. 99 
Example 2 :— 
Boulenger, G. A. 14.31.4: 81.2 
1896. Remarks on the Dentition of Snakes and on the Evolu- 
tion of the Poison fangs. Proc. zool. soc. London, 1896, Pt. 3, 
p. 614-616. [Criticism of G. S. Wxst, Proc. 1895, p. 812. 
Missing teeth mistaken for diastemata. 5 grooved teeth in 
Oxybelis. No fundamental difference between Proteroglypha 
and non-venomous Colubride. ] 
ree : ul : edidit Concilium Bibliographicum. 
In Bibliographia Universali-59 ies) Typographia Concilii Bibliographiei, 
Example 3:— 
Rothschild, W., and K. Jordan. 57.87 Asota (502) 
1897. Notes on Heterocera, with Descriptions of new Genera 
and Species. Novitat. zool. Tring. Vol. 4, p. 314-365. 1 pl. 
[Asota: 3 nn. spp., 36 nn, subspp.] 
The classification number above referred to is perhaps 
the most important part of the whole scheme. It is based on 
the decimal system of Melvill Dewey, which has been greatly 
extended, without being altered, in order to meet the require- 
ments of this catalogue. or instance, the large group of 
worms, which Dewey left as a unit under the number 595.1, 
has been subdivided into seventeen classes in accordance 
with the developments of systematic zoology. The heading 
“Geographical Distribution” has been greatly enlarged, so 
as to include not only particular countries and states, but 
also such local categories as deserts, caves, oceans, rivers, 
lakes, etc. 
To avoid needless repetition, the figures 56 and 59, which 
