SPECIES OF PERIPATUS. 577 



(13) Skin -pigment green or black with reddish patches, but little affected 

 by spirit. (14) Without well developed coxal organs. (15) Crural glands 

 unknown. (16) Accessory glands of male unknown. This species is 

 specially interesting, because, while occurring so near Neo-Peripatus and 

 i-esembling it in two important characters found nowhere else (endogenous 

 ovary and small ovum), it differs from that group in most of its characters 

 and approaches Capo- Austro- and Melano-Peripattis. But it possesses 

 two important peculiar features (Nos. 10 and lla). In our opinion the 

 association of this species with the Cape species P. cinctipes in Pure-ell's 

 genus Opistliopatus is inadmissible. The discovery by Bouvier of the 

 characters of Chilio-Peripatus is the most important which has been made 

 since Evans discovered and described Eo-Peripatus. 



The important lessons which the distribution of the species of Peripatus 

 teach are, (1) the geographical groups of species are natural zoological 

 groups, (2) the distinguishing specific characters are distributed in a 

 haphazard manner in the different groups, so that it is quite impossible 

 to show the phylogenetic affinities of the species by a genealogical tree. 



Z III 



