480 RICHARD EVANS. 



Class ONYCHOPHORA. 



Family I. Peripatidse. 



Sub-family 1. Peripatinfe, 



Genus 1. Eoperipatus^ (gen. nov.). 

 „ 2. Peripatus (Pocock) (12). 

 ,, 3. Mesoperipatus (gen. nov.). 

 Sub-family 2. PeripatoidinEe. 



Genus 4, Peripatoides (Pocock) (12). 

 J, 5. Opisthopatus (Purcell) (13). 

 Sub-family 3. Peripatopsinae. 



Genus 6. Peripatopsis (Pocock) (12). 

 Sub-family 4. Paraperipatinae. 



Genus 7. Paraperipatus (Willey) (17, 18). 



The above classification follows the same lines as that of 

 Bouvier. In fact, it amounts to little else than the breaking 

 up of Bouvier's genus Peripatus into three genera, and the 

 formation of a number of sub-families by the grouping to- 

 gether of the genera. 



The feature which has been considered in the formation of 

 sub-families is the gradual degeneration of the last two pairs 

 of legs, and the position of the genital openings. These 

 characters formed the basis of Mr. Sedgwick's division into 

 groups, and later of Mr. Pocock's formation of three genera, 

 as well as of M. Bouvier's four divisions. 



I shall now proceed to give a formal definition of the 

 above four sub-families. 



1. Peripatinge: — The genital orifice is situated between 

 the penultimate pair of legs. There is a slight reduction in 

 size, but no actual degeneration in structure of the last two 

 pairs of legs, further than that they do not possess the full 

 number of pads. 



* I am indebted to J. W. Jenkinson, Esq., M.A., of Exeter College, Ox- 

 ford, for the term Eoperipatus, as expressive of tiie distribution of the 

 genus iu the East. 



