MYRIAPODA. 209 



length. Their head is furnished with two short antennae, com- 

 posed of seven joints. They have two granulated eyes, formed 

 by the junction of numerous and smaller smooth ones ; two 

 dentated mandibles, proper for bruising or cutting their food, 

 and divided transversely by a suture ; and a labium or lip with- 

 out palpi, formed of united portions. The two or four anterior 

 feet, joined at their base, are analogous to the pedipalpi of the 

 Crustacea. The stigmata or air-vessels are often very small, 

 and exceed in number those of insects. 



The nervous system in the Myriapoda is composed of a se- 

 ries of ganglia, one in each segment of the body, communicat- 

 ing by a longitudinal chord. 



The animals of this class are found under stones, the bark of 

 trees, &c. and feed on vegetable or animal substances. 



Latreille divides the class of Myriapoda into two orders, viz. 

 I. CHILOGNATHA. Antennae filiform, of seven joints ; mouth 



composed of two mandibles, and a lip divided by sutures ; 



two or four anterior feet united at the base. 

 II. CHILOPODA. Antennae setaceous, of fourteen joints and 



upwards ; mouth composed of two mandibles, a multifid lip, 



two palpiform feet, and a second pair of feet united at their 



base, with a perforated hook. 



ORDER I. CHILOGNATHA. 



Antennae of seven joints, filiform ; mouth composed of two man- 

 dibles, and a lip divided by sutures ; two or four anterior feet 

 united at their base, like pedipalpi ; spiracles indistinct. 



The body in this group is generally crustaceous, and often cylindrical. Their feet 

 are very short ; they walk slowly, and roll themselves into a spiral form or into a 

 ball. The first segment of the body is longest, and each segment has for the most 

 part two pairs of feet The antennae are thickest towards the end, or fiiiform. very 

 short, and of seven joints ; the spiracles are concealed or indistinct. They feed on 

 dead and decomposed animal or vegetable substances. 



FAMILY I. ANGUIFORMIA. 



Body generally linear, covered with a solid skin, and without 

 appendages at the anus ; antennae thickest towards the end ; 

 feet at least thirty-two. 



Gen. 1. GLOMERIS, Lat. Armadillo, Cuv. Julus, Lin. 

 Antennae with the two first joints shortest, the sixth largest, in- 

 cluding the last, which is very small ; body elongate-ovate, 

 convex above, arched beneath ; first segment a small semicir- 

 VOL. IT. o 



