520 



MYRIAPODA. 



the intermediate segments. lAthobitis forficatiist L., with fifteen pairs of 

 legs. 



Fam. Scutigeridae. The antennas are at least as long as the body. The legs 

 are long, their length increasing from before backwards. Facetted eyes instead 

 of ocelli. With a small number of free terga. Scut ig era colevjitrata L., South 

 Germany and Italy. 



Order 2. CHILOGNATIIA. 



The shape of the body is cylindrical or. subcylindrical. There is a 

 f our -lobed plate behind the mandibles, and two pairs of legs on each 

 segment (the anterior segments excepted). The genital openings are 

 on the coxal joint of the second pair of legs. 



The body of the Chilognatha is, as a rule, cylindrical or sub- 

 cylindrical. The segments have the form of complete rings, or are 

 prodded with special dorsal plates. In many cases (Julidce) the 

 body is much elongated ; in others (Glomeris] it is short, like that of 

 a wood-louse (fig. 427). The antennae are short, and consist only 



of seven joints, 

 b _<^i. of which the last 

 may abort. The 

 mandibles are 

 provided with 

 broad masticating 



FlG. 427. a, Glomerit marginata (after C. L. Koch). 4, Maxillae Surfaces, which 

 (inferior buctal plate) of Julus terrestria. 



serve to crush the 



vegetable matters on which the animals feed, and with an upper 

 movably articulated pointed tooth. The maxillae are united so as to 

 form an inferior buccal plate, the sides of which bear two rudimentary 

 hook-shaped blades (fig. 427, b), while the middle portion appears 

 to represent the underlip. The eyes, which as a rule consist of 

 aggregated simple eyes, are situated above and external to the 

 antennae. The anterior thoracic legs are as a rule directed forwards 

 towards the mouth. The three thoracic segments, and sometimes 

 the next two or three segments, bear a single pair of legs. All the 

 others, except the seventh in the male, bear two pairs. Stigma/ a are 

 present in all the segments, and are more or less hidden beneath the 

 coxal joints of the limbs. The rows of pores (foramina repugnatoria) 

 on either side of the Lack, which are often taken for rows of 

 stigmata, are the openings of cutaneous glands, and secrete a cor- 

 rosive thud for the protection of the animal. The generative organs 

 open en the coxal joint of the second pair of legs, and in the male 

 sex there is also a paired copulatory organ present on the seventh 



