SUPPLEMENT TO ORDER MYRIAPODA. 1^7 



The myriapods make their habitation in the earth under 

 the different bodies placed upon its surface, under the bark 

 of trees, moss, and between the leaves of some vegetables 

 cultivated in our gardens, and are greatly attached to con- 

 cealment and obscurity. 



Certain very singular fossil animals, the analogues of 

 which have not been discovered, and many of which form 

 the mineralogical composition of the strata in which they 

 have been found, appear to belong to races totally annihi- 

 lated by the ancient revolutions of the globe : the trilobites 

 seem to fill vip the void between the myriapoda and the 

 Crustacea. 



We shall content ourselves here with a slight notice of the 

 genus luLUs, in the family ckilognatha of this order. The 

 body is composed of a great number of short rings, of a 

 hard smooth substance, somewhat calcareous. The number 

 of these rings varies according to the species. With the 

 exception of two or three at eacli extremity, they are equal, 

 and each of them have, underneath, two pairs of feet, con- 

 tiguous or closely approximating at their origin. The head 

 of the iuli is of the same breadth as the body, flat under- 

 neath, convex and rounded above in the hinder part, a little 

 more narrow and almost squared afterwards from the eyes. 

 The anterior edge is emarginated in the middle. The eyes 

 are buried in the surface of the head. They are oval, level, 

 and formed of small grains of an irregularly hexagonal 

 figure. Near their internal side are inserted the two an- 

 tennae, which are but little longer than the head, rather 

 thick, and with seven articulations. The mouth is composed 

 of two large mandibles, and a crustaceous piece or sort of 

 under lip, covering transversely the under part of the head. 

 The mandibles have some relations with those of the wood- 

 lice, and a structure altogether peculiar, to which nothing 

 analogous is found out of the order myriapoda. They are 



