292 Mr. E. I. Pocock on the 



as a new genus of Diplopods belonging to the Archipolypoda, 

 a group of which he is himself the founder, are in realitj 

 fragments of a fossil fern ! 



Concerning the position that the Diplopoda should occupy 

 with regard to the Chilopoda and Hexapoda, I believe the 

 relationship between the two last-named to be greater than 

 the relationship between the Chilopoda and Diplopoda. At 

 all events the recent careful researches into the organization 

 of Scolopendrella and of the Thjsanura, carried on by Drs. 

 Haase and Grassi, demonstrating as they do the affinity 

 between the Hexapoda and the Chilopoda, are sufficient justi- 

 fication for the abolition of the name Myriopoda and for the 

 elevation of the groups Chilopoda and Diplopoda to the rank 

 of classes. 



For the sake of comparison I have drawn up tabular lists 

 of the classifications of the Diplopoda formulated by various 

 naturalists. 



Newport, 1844 (Trans. Linn. Soc. xix. p. 276), 



Order CHILOGNATHA.. 



Tribe I. Pentazonia. 



Fam. Glomeridce. 



Tribe II. Monozonia. 



Fam. Polyxenidfe. 

 Polydesmidce. 



Tribe III. Bizonia. 



Fam. lulidce. 



Polyzonidce^ 

 SiphonopJiorid(S, 



Wood, 1865 (Am. PhiL Soc. xiii. p. 246). 



Order GHILOGNATHA. 



Suborder I. Pentazonia. 



Fam. Qlomei-idce. 



Suborder II. Stbgjsigyjlia. 



Fam. Folyxenidce. 

 Polydesmidce. 

 lulidce. 

 Lysiopetalidce. 



Suborder III. Sugentia. 



Fam. rolyzonidce. 



Siphonophoridm^ 



