///. MALACOPODA. 



457 



tubes which arise in numbers from the spiracles, which are irregu- 

 larly distributed in each somite (fig. 478, tr). 



FIG. 478. Anatomy of female Peripatus opened dorsally. (From figures of Moseler 

 and Balfour.) a, anus ; at, antennae ; 6m, ventral nerve cords; d, digestive tract; 

 go, genital opening ; o, ovary ; ogr, brain ; p, pharynx ; sd, slime gland ; so, ne- 

 phridia ; sp, salivary gland; tr, tracheae ; w, uterus. 



The soft-skinned body, which shows no external ringing, bears 

 the legs, each terminated by claws. These legs somewhat resemble 

 the annelidan parapodia in that they are not jointed and are not 

 sharply separated from the trunk. Each segment bears legs, while 

 the head is provided with three pairs of appendages: a pair of 

 ringed antennae, a pair of mandibles, which lie in the oral cavity, 

 and a pair of mouth papillae, at the tips of which are the openings 

 of the slime glands, the sticky secretion of which is squirted out 

 and serves to capture insects (fig. 478, sd). 



The nervous system consists of a pair of cerebral ganglia (og), 

 supplying the antennae and a pair of very primitive eyes; and a 

 pair of ventral cords (bin), swollen slightly in each segment, which 



