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are inserted, near tlie last pair only one seta. The anal segment 
is dorsally free. The legs have a moderately short claw with a 
pad at the base, in front of this claw a very small claw without 
pad, behind the middle claw a pad but scarcely any claw. 
Remarks. In this diagnosis I have collected the characters 
which, in my opinion, define the family. But having only examined 
one adult specimen of a single species I have perhaps admitted 
some features which in the future, when more forms have been 
discovered, must be removed as being only generic characters. — 
It is necessary to set forth some remarks on various features. 
Characters drawn from the structure of the antennæ have not 
been accepted in the diagnosis; no feature observed in fchese organs 
are not met with either in Stylopauropus or in Pauropus siamensis. 
The upper surface of the head is rather firmly chitinized in my 
specimen, but this feature is not mentioned by Latzel as to his 
species, and therefore I did not venture to insert it in the diag¬ 
nosis. I have found nine pairs of hairs on the upper surface of the 
head, which is the same number as in the fam. Pauropodidæ\ each 
of the two anterior rows has two pairs, but the other pairs are ar- 
ranged so divergently, that I did not venture to draw homologies 
between the two families. — The tactile setæ are almost equal in 
length, and the first is at least not shorter than the last. That 
the third pair of these setæ is strongly swollen before the middle 
is of slight importance. — The existence of short setæ near the 
tactile setæ is, in my opinion, a good character; they are quite 
absent in the Eurypauropodidæ , while they are developed as sub- 
lateral hairs or setæ in the fam. Pauropodidæ ; in this last-named 
family they are placed on the terga, while in Brachypauropodidæ 
they are inserted rather distant from the more firmly chitinized 
dorsal plates, and their number is just the same as in the genus 
Pauropus. In my species of Brachypauropus they are stifif and 
curved (but not real hooks as in Br. hamiger Latzel), and in the 
present state of knowledge it is impossible to say if their curved 
shape and their length present characters of higher value. — The 
