ON THE OVIPAROUS SPEOTliS OF ONYCHOPHOEA. 369 



integument interrupted in the mid-dorsal line by a narrow 

 longitudinal groove, from the floor of which pigment is 

 absent. Papillae in an approximately single row on each 

 transverse ridge. 



h. External Characters. 



Shape and Size. — In shape all three species do not differ 

 conspicuously either amongst themselves or from other 

 Australasian Onychophora. It must be remembered that 

 we have in Australasia species of Onychophcra with 

 fourteen [0. insignis, 0. viridimaculatus], fifteen 

 [P. Leuckartii, P. occidentalis, P. novie-zealand ite, 

 0. oviparus], and sixteen [P. Suteri] pairs of walking 

 legs respectively, and, as might be expected, the size 

 of the adult appears to be proportional to the number 

 of pairs of legs, O. insignis and O. viridimaculatus 

 being, so far as my experience extends, usually some- 

 what smaller than P. Leuckartii, P. novte-zealandia3, 

 and 0. oviparus; while P. Suteri^ is considerably 

 larger than any of the others. The " anal cone " 

 (figs. 10, 31) is only about as long as the legs of the last 

 pair. It is less well developed than represented by Sedgwick 

 (2, fig. 23) in P. novFe-zealandite, upon which Bouvier's (2) 

 diagram of the genus Peripatoides appears to be founded. 



Appendages. — The number of claw-bearing walking legs 

 is, as has just been stated, either fourteen or fifteen in the 

 species of Ooperipatus hitherto described, but in view of 

 past experience it would be unwise to generalise from these 

 three species, and it is quite possible that species with more 

 or even fewer pairs of legs may be forthcoming. Each leg is 

 provided with three spinous pads, of which the middle one 

 is the broadest, while the proximal one is very narrow. The 

 foot is provided with the usual pair of horny claws and 

 dorsally with three conspicuous primary papillte — anterior, 

 posterior, and median. 



The oral papilla) have the usual structure, consisting each 

 ' Deniiy (13.). 



