440 R. I. POCOCK. 



proposed in 1896 ('Biol. Ceiitr. Araer./ Cliilopoda) — a classi- 

 fication which, allowing for the alteration in terminology 

 and an elevation in rank of the groups, was that of 

 Latreille, Brandt, and Newport amplified. 



Two sub-classes were recognised, the Artiostigma for the 

 order Scutigeromorpha, and the Anartiostigma for the Litho- 

 biomorpha, Scolopendromorpha, and Geophilomorpha. 



If, as I venture to think, this system expressed at the 

 time more accurately than Haase's the importance of the 

 characters of Scutigera and the relationship between the 

 Lithobiidfe and tlie Scolopendridse, the opinion that it 

 embodies receives the strongest support from the discovery 

 of Craterostigmus. In no sense does this genus tend to lessen 

 the structural interval between the Scutigeroid and Litho- 

 bioid types; but it largely depreciates the value of the 

 characters the two have in common — the characters, in short, 

 upon which Meinert and Haase relied when uniting them. Those 

 who in the future maintain the Anamorpha must base this 

 group upon the completeness of the penultimate and ante- 

 penultimate segments of the toxicognaths and the numbers 

 of stigmata and pairs of legs, if Craterostigmus be included ; 

 for this genus negatives the remaining characters of the 

 group, with exception of the number of legs at hatching, 

 a point about which few would venture to hazard a guess so 

 far as Craterostigmus is concerned. 



In connection with the classification here submitted, it is 

 desirable to justify the changes in terminology that have 

 been introduced. Notostigma and Pleurostigma are preferred 

 to Artiostigma and Anartiostigma because the latter were 

 used in a much more restricted sense by Silvestri ; and to 

 Schizotarsia and Holotarsia because these two lost their 

 applicability with the discovery of Cermatobius. Ungui- 

 palpi connotes a character which holds only when the 

 Lithobiidse are associated Avitli the Scutigeridje ; and Panta- 

 stigmata and Oligostigtnata make no allowance for the 

 pantastigmous character of Plutonium, which neverthe- 

 less is closely related to the oligostigmous forms. 



