328 General Notes. [March, 
Chilognaths, że. the Julide. They appear, in reality, in length to 
be intermediate between those of the Julidz and Lysiopetalide; 
the terminal joint is long and free, and seem, as seen in: Pl. 13, | 
figs. 7 and 18 to be 7-jointed as in all Chilognaths, the terminal 
or seventh joint being rather long and slender, as in the Lysiope » 
talidæ. 
The most. striking character of the. Archipolypoda appears 
to be the presence of a large spiracle on each segment instead 
ofalternate segments, as in Chilognaths and Chilopoda. In position 
the spiracles are as in other Myriopods* Another important 
features is the great development of the sterna, which are broad, 
so that the insertion of the legs. are wide apart; the scuta do not 
of course descend so far down on the sides as in the Julidæ; but 
an approach to the form of a section of the body, is seen in the 3 
Polydesmidæ,and particularly in Polyxenus; in this genus,as in the i 
Archipolypoda, the sternites or “ ventral plates” also“ occupying 
the entire ventral portion.” With the exception of the fact that the 
spiracles are apparently developed upon each segment instead of 
alternate, we do not find in the author’s diagnosis any $M 
Lysiopetalidæ, but standing below them. We would agree © 
Mr. Scudder that the Archipolypoda are an ancient type and n 
precursors of the modern Chilognaths. This is suggested bys | 
retention and enlargement of the spiny sete which occur 
embryo and larval Chilognaths,and ther ofa pair ot SP 
on each segment. In Hexapoda each segment behind pe 
in the embryo bears a pair of spiracles, and when as erap 
known of the development of Myriopods as of that of He 
and Arachnids, this may be the case with Myriopo® 
essential characters of the Chilognaths are that all the 
phalic segments behind the three first, bear each two pails < 
The Archipolypoda do not differ from them in this respec 
other essential feature is that they possess one pair 0% 
appendages less than the Chilopods; and from the form 
head, the eyes, the antennz and especially the swollen = 
Scudder’s figs. 16, 18, pl. 13, which recalls the peculianly 
Lysiopetalidz, we have good reason for inferring that ' ie 
polypoda had a pair of mandibles and a pair of maxill@, 
under lip. j 
The legs of some of the Archipolypoda appear to r 
pressed and slightly expanded, strengthened also on je 
surface by longitudinal ridges, and have in every respect ™ 
o minute paifs 
almost wholly diplopodoas, We are almost inclined to regard t order. a 
Chilognaths, but at present should retain them as types of a distin 
E +h a eR + 
ms the Archi 
