VI. 
AN ENUMERATION OF THE PAUROPODA. 
An opportunity of comparing European and American species of 
Eurypauropus has directed attention to the fact that the structural di- 
veisities of the various members of this class have not received 
proper systematic recognition. The analogy of the Diplopoda shows 
that important and long-standing divergencies may exist with slight 
change in the antennae and mouth-parts, and that the structure of the 
exoskeleton is subject to little variation. This general stability is 
correlated with the similarity in the habits of all Progoneata, with 
the result that structural differences are of much greater morphologic 
and systematic importance than would be inferred while adherence is 
given solely to Hexapod analogies. In accordance with this view it 
is proposed to recognize among the Pauropoda three orders represented 
by Pauropus, Eurypauropus and Brachypauropus, and named respect- 
ively Cinona, Eepona, and Monona. The Cinona and Eepona have 
seven dorsal plates, four of which are double and cover two pedifer- 
ous segments each, while in the Monona each pair of legs has a 
dorsal plate to correspond. It may be objected that strict priority 
would compel the use of the name Pauropoda instead of Cinona, in 
which case Bollnian’s name Monopoda, though hardly appropriate, 
might be used for the class, but this change would probably not meet 
with general acceptance. 
The genera of Pauropoda are not numerous, and the described rep- 
resentatives of the three orders are not so divergent as to require 
more than one family in each. The Pauropodidae contain two 
genera, Pauropus and Stylopauropus"^; the Eurypauropodidae four, 
Eurypauropus, Trachy pauropus, Cyphopauropus t and Acopauro- 
pusf ; the Brachypauropodidae are as yet monotypic, known only 
from s Brachypauropus hamiger. 
That the Pauropoda are worthy of the class rank given them by 
Pocock can scarcely be doubted. The antennae alone would go far 
toward such a determination when we consider the stability of form 
* A new genus based on Stylopauropus atomus, sp. n,, and probably also 
including St. pedunculatus (Lubbock). 
t Established for Trachypauropus 7nargaritaceus Toemoesvary on account 
of the characters noted in the appended list of species. 
t Based on Eurypauropus ornatus Latzel, of which I have studied speci- 
mens belonging to the Berlin Museum. 
Brandtia d. 2g. 
