TWO NEW SPECIES OF ONYCHOPHOBA. 481 



2. Peripatoidinae : — The genital orifice is situated be- 

 tween the last pair of legs wliicli are not reduced in size. 

 The hiudermost pair^ found in the Peripatinfe, is obsolete. 



3. Peripatopsinse : — The genital orifice is situated be- 

 tween the last pair of legs (anal papillfe), which are much 

 reduced in size and degenerate in structure. According to 

 Purcell the anal papillae may be obsolete (13). 



4. Paraperipatinae : — The genital orifice is situated 

 behind the last pair of legs. The vestigial pair found in the 

 Peripatopsinae has completely disappeared, and the last 

 existing paii', which is pregenital in position, is reduced in 

 size. 



Now that the sub-families have been defined, it seems 

 necessary to sum up the main characters of the genera. It 

 is impossible to form concise definitions of them, because in 

 several cases some of the more important characters are 

 common to more than one genus — a fact which points to the 

 desirability of arranging the genera on a wider plan than 

 the one which has been adopted, and of giving the rank of 

 families to the groups here described as sub-families. It is 

 highly probable that future investigation and more extensive 

 knowledge of the class Onychophora will tend towards the 

 adoption of the course above suggested. However, it may 

 be useful to give a summary of the leading features of the 

 several genera here i-ecognised. 



Genus 1. Eoperipatus : — The legs have either four or 

 five pads. The renal papillae of the fourth and fifth pairs of 

 legs are situated either in the middle of the proximal pad, 

 that is, the fourth pad, or on its proximal side. The legs in 

 question have only four pads. The feet are provided with 

 two papillte situated on their distal margin, one in front and 

 one behind. There are four ventral prominences on the feet, 

 which are provided with one or more spines, similar to those 

 found on the erect distal papillae, and pointing downwards. 

 The outer blade of the jaw has two accessory teeth on the 

 inner side of the main tooth. The inner blade may have 

 three accessory teeth on the inner side of the main tooth. 



