44 BRITISH TYEOGLYPHID^:. 



ambulacral suckers found at the distal end of the tarsus 

 in many genera, because these suckers do not exist in 

 Rhizoglyphiis, and that was the very distinction upon 

 which Claparede founded the genus ; moreover, these 

 suckers, where they exist, are not confined to one sex. 

 I cannot say that I like the wide separation of 

 Hericia from Ca/rpoglypkw in this classification, nor 

 that of GlycypJingus from Dermaccirus ; in each of these 

 cases the two genera respectively seem to me to be 

 closely allied. 



