1879.) A New Genus of Minute Pauropod Myriapods. 607 
and is overlapped in a peculiar way by the first, as seen in the 
diagrammatic side view of the animal in Fig. v, where the other 
segments are seen to overlap each other in succession in a simi- 
lar manner. The third segment, of nearly similar proportions, 
has a notch in each lateral margin from which a simple hair arises 
as in the preceding segment. The fourth segment is very similar 
to the preceding in proportions, and is notched laterally in the 
same way, but from the notches on either side there arises a hair 
ending in a bulbous extremity. The fifth’segment is somewhat 
like the first in form, but has a notch at either side from which 
there arises a simple hair, and it is truncate behind, the truncated 
part exceeding very slightly in width the diminutive sixth seg- 
ment, which is nearly hidden beneath the fifth. On either side of 
the sixth segment, from a depression, there arises a short hair 
about half as long as the hair preceding. 
I am led to surmise that the notches at the sides of the third, 
fourth and fifth segments of the adult possibly indicate that these 
were primitively compound, and in reality represent two seg- 
ments fused together, which would make nine in all, counting the 
others as single; this view, though, evidently is not without | 
objection, as there is quite as much ground for a belief that the 
others are equally as compound. From this point of view the 
structure of Eurypauropus becomes of the highest interest to the 
morphologist as representing the most extreme point in the reduc- 
tion of the number of segments in myriapods. It is in fact Pau- 
ropus with the number of legs characteristic of that genus, but with 
a number of its segments obliterated by becoming apparently 
fused together and otherwise modified. 
Two pairs of legs are attached to each of the second, dink 
fourth and fifth segments, which, with the single pair in the first 
segment, make nine in all. The legs are completely concealed 
from above, in life, by the lateral expansion of the body segments 
as in Pauropus, but the expansions are not composed simply of 
chitinous pleural pieces as in the latter, but the thin yielding 
whitish ventral body wall extends almost to the very margins of 
the segments. The joints of the legs are composed of thicker 
rings of chitin than in Pauropus, and the only portion of the 
creature where a thin chitinous body wall is apparent, as in the 
old genus, is about the head and belly. There is also no evi- 
dence of segmentation to be found here, the covering seeming to 
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