164 THE GENUS PERIPATUS. 



foot on which they are placed is especially retractile, and is 

 generally found more or less telescoped into the proximal part 

 (as in the figure) . 



The fourth and fifth pairs of legs exactly resemble 

 the otherS; except in the fact that the proximal pad is broken 

 up into three, a small central and two larger lateral. The 

 enlarged segmental organs of these legs open on the small 

 central division. 



The last (17th) leg of the male (fig. 4) is characterised 

 by possessing a well-marked white papilla on the ventral 

 surface. This papilla, which presents a slit-like opening at 

 its apex, is placed on the second row of papillae, counting from 

 the innermost pad, and slightly posterior to the axial line of 

 the leg. 



The anal papillae, or as they should be called, genera- 

 tive papillse, are placed one on each side of the generative 

 aperture. 



The generative aperture is subterminal and on the 

 ventral surface. It is inconspicuous in most specimens. 



Internal Anatomy. — The points of internal anatomy 

 which require to be noted in an account of the species relate 

 entirely to the generative organs. In the male the ductus 

 ejaculatorius (posterior unpaired part of vas deferens, penis of 

 Moseley) is short, and the crural glands of the seventeenth 

 pair of legs are much elongated, reaching forward for a 

 considerable distance in the lateral compartment of the body 

 cavity. 



In the female the ovaries are closely approximated and 

 short. They are united to the floor of the pericardium by a 

 single ligament passing ofi' from their front end. Receptacula 

 seminis are absent. The ova contain but little food-yolk. 

 They are oval in shape, and the greatest length of an unseg- 

 mented ovum which has passed into the oviduct is '56 to '6 mm. 

 Habits. — They live beneath the bark and in the crevices 

 of rotten stumps of trees, and beneath stones. So far they 

 have only been found, so far as I can ascertain, in the woods 

 on the slope of Table Mountain. They require a moist atmo- 



