MYRIAPODA. 335 



divisions of the Trilobites along each of its inferior sides. These animals are 

 terrestrial, and live under stones in hilly places. 



IULUS, LmnfBUs. 



The body of the true luli is cylindrical and very long, and has no ridge or 

 trenchant edge on the sides of the annuli; they roll themselves up spirally. 



The larger species live on land, particularly in the woods and sandy places, 

 and diffuse 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. There are two other genera, viz. Polydcsmus and 

 Polyxenus. 



FAMILY II. 



CHILOPODA. 



THE antennae of the Chilopoda are more slender towards the extremity, and 

 consist of fourteen joints and upwards. Their mouth is composed of two 

 mandibles furnished with a little palpiform appendage, which seem to have 

 been soldered in the middle, and terminate like the bowl of a spoon with 

 dentated edges ; of a quadrifid lip, of two palpi or little feet, and of a second 

 lip formed by a second pair of feet, dilated and united at base, and terminated 

 by a stout moveable hook, whose inferior extremity is perforated by a hole 

 which affords an issue to a venomous fluid. 



The body is depressed and membranous. Each of its rings is covered with 

 a coriaceous or cartilaginous plate, and most generally bears but a single pair 

 of feet ; the last is usually thrown backwards, and elongated into a kind of tail. 

 The organs of respiration are wholly, or partly, composed of tubular tracheae. 



These animals run very fast, are carnivorous, avoid the light, and conceal 

 themselves under stones, logs, in the ground, &c. They are much dreaded by 

 the inhabitants of hot climates, where they are very - large, and where their 

 venom is possibly more active. The Scolopendra morsitans is styled in the 

 Antilles the malfaisante. Some of them exhibit phosphorescent properties. 



The Chilopoda, which, in the system of Leach, form the order Syngnatha, 

 from these last characters, the nature of the respiratory organs and the feet, 

 may be thus divided : 



Some have but fifteen pairs of feet, and their body viewed from above 

 presents fewer segments than when seen from beneath. 



SCUTIGERA, Lamarck. 



The body covered with eight scutelliform plates. The under part of the 

 body is divided into fifteen semi-annuli, each bearing a pair of feet, terminated 

 by a very long, slender, multi-articulated tarsus; the last pairs are more 

 elongated ; the eyes large and compound. 



