MYRIAPODA. 
349 
until November, at which time M. Savi terminated his observations, 
these changes take place about once a month. In their exuviae, we 
find even the lining membrane of the alimentary canal and tracheae. 
The organs of the mouth Avere the only parts that Savi could not 
discover *. 
These Insects feed on dead and decomposed animal and vegetable 
matters; they deposit in the ground a large number of eggs. Ac- 
cording to the system of Linnaeus they form but one genus, that of 
luLus, Lin. 
Which we divide as folloAvs : 
Some have a crustaceous body without terminal appendages, and 
antennae enlarged near the end. 
Glomeris, Lat. 
Resembling Onisci; oval, and rolling into a ball; the body convex 
above, and concave underneath, with a range of little scales analo- 
gous to the lateral divisions of the Trilobites along each of its in- 
ferior sides. It is composed, exclusive of the head, of but twelve 
segments, the first and narrowest of Avhich forms a sort of semicir- 
cidar transverse collar; the following and the last are the largest of 
all; the latter is arched and rounded at the end. There are thirty- 
four feet in the female, and thirty-two in the male, his sexual organs 
replacing the pair that is deficient. These animals are terrestrial, 
and live under stones in hilly places f. 
I ULUS, Lin. 
The body of the true lull is cylindrical and very long, and has no 
ridge or trenchant edge on the sides of the annuli; they roll them- 
selves up spirally. 
The larger species live on land, particularly in the woods and 
sandy places, and dift’use a very disagreeable odour. The 
smallest ones feed on fruit, or the roots and leaves of esculent 
vegetables. Others are found under the bark of trees, in 
moss, &c. 
I. maximus, L.; Marcgr., Bras., p. 255. Peculiar to South 
America, and is seven inches long. 
I. sabiilossus, L.; Schaetf. Elem. Entoin., Ixxiii; I. fasciatus, 
De Geer, Insect. VH, xxxvi, 9, 10; Leach, Zool. hliscell., 
cxxxiii. About sixteen lines in length, of a blackish-brown. 
* See Bullet. Gener. et Univers. of the Baron F^russac, Decemb., 1823. The 
observations of Savi, an extract of which is contained in this work, were published 
in a memoir, intitled “ Osservazioni per servire alia storia di una specie di Julus 
communissima” Bologna, 1817. The same savant published another in 1819 on 
the Julus fafidissimus. 
p lulus ovciliSf L. ; Gronov., Zooph., pi. XVII, 4, 5 j — Oniscus zoHutuSf Panz. 
Fam. Insect. Germ., IX, xxiii; Glomeris marginata, Leach, Zool. Miscell., CXXXII ; 
— Omniscus pustidatus, F&h. ; Panz., Ib., XXII. 
