1879.] A New Genus of Minute Pauropod Myriapods. 609 
are well marked. The thickness of the dorsal chitinous pieces of 
the segments is much less than in the adult, and hence the ani- 
mal is much more transparerit. From each side, and where the 
head segment joins the succeeding one, there arises a simple hair 
as in the adult, and from each side posteriorly at the points where 
the third and the fourth segments join there arises a clubbed 
hair. The legs are six in number, as is usual in larval myriapods, 
and appear to be confined entirely te the second segment, and 
have the same number of joints as those of the adults. The 
antennz are of the same form and proportion as in the adult, and 
have similar terminal appendages. The mouth parts are likewise 
similar, and the wide free border of the head segment extends 
forwards and downwards anteriorly beyond the head, the same as 
in the full grown ones. The young, as would naturally be 
inferred, are very much paler in color than the old ones, and are 
of a pale reddish-white or lilac tint, whilst the adults are of an 
isabeline or pale rusty-red color, the closely set appressed spines 
on the back giving them a perceptible silky lustre when observed 
with reflected light; they are much paler below. Their color 
when viewed with transmitted light, is pale brown, due to the 
chitin of the body walls. It will be readily seen that the con- 
trast in color between the new form and Pauropus, which is 
almost white, is very great, and sufficient to constitute, with its 
other features, a very important distinction. 
The internal anatomy of the new genus I have not yet been 
able to work out satisfactorily, owing mainly to the want of an 
abundance of material wherewith to prosecute the investigation, 
and also not less on account of the want of proper methods. 
These latter I think I will soon be able to apply. The entire 
bulk of the animal is perhaps three times that of Pawropus, and is 
therefore better adapted for anatomical study than the latter. 
~ In habit Aurypauropus is much more sluggish than Pauropus, 
and does not scamper away into the nearest crevice like the lat- 
ter when its haunts are exposed to the light. The specimens 
which I kept in confinement were placed in a wide-mouthed 
ounce vial, half filled with moist earth and corked up, into which 
I had placed some fragments of rotten wood, under which the 
animals could retreat; in this close place the animals lived for the 
time I have before stated. In physiognomy they much resemble 
diminutive sow-bugs, and they also resemble these in the choice 
