TYPE TBAOHEATA. 475 



the Cape species (Fig. 218) from about five to six and a half 

 centimetres in length, and is found beneath stones or bark or 

 amongst decaying wood. The body-wall is finely annulated, 

 the annuli not, however, corresponding to segments, and the 

 cuticle is thin, small papillae being scattered all over the 

 surface of the body, each terminating in a short bristle. 

 The head is but poorly marked off from the rest of the body 

 and bears a pair of many-jointed antennae, at the base of each 

 of which towards the sides of the head is situated an eye. The 

 mouth lies in the middle of the ventral side of the head and 

 is surrounded by numerous papillae, and within its cavity is 

 situated a pair of jaws furnished with strong chitinous sickle- 

 shaped teeth. These jaws really represent the second pair of 



Fig. 218. — Peripatus capensis (after Moseley from Balfour). 



appendages, the third pair being represented by two short 

 papillae lying at the sides of the head and having at their tips 

 the openings of a pair of glands which extend far back into 

 the body-cavity and from which, when the animal is irritated, 

 there is violently emitted a sticky fluid, whence the glands 

 have been termed the slime-glands (Fig. 219, sd). There is 

 no division of the trunk into thoracic and abdominal regions, 

 and it bears a number, varying according to the species from 

 seven to twenty-one pairs, of ambulatory- appendages, each of 

 which consists of a proximal stouter and somewhat conical 

 portion bearing rings of papillae and a more slender short 

 distal portion which bears at its tip a pair of claws (ungues). 

 These limbs are unsegmented, differing in this respect from 

 those of the Myriapods and Insects, and are also soft owing 

 to the thinness of the cuticle, a feature which has suggested 

 the name Mcdacopoda formerly applied to the type, as the 

 presence of 'the terminal ungues has suggested the term 

 Onychophora. The anus is situated at the posterior extremity 

 of the body and has on either side of it the anal papillae 

 which represent the last pair of limbs. 



