REMARKS ON THE NATURAL ARRANGEMENT OP THE MTRIAPODA. 241 



M. Gervais (Apteres, vol. iv), divides the Chilognatha into five families, — the Polyxe- 

 nidje, Glomerid/E, Polydesmiid.e, Ioxid.e, and Polyzoniidce. Of these, the Potyxenidce 

 and Pol yclesm idee are the same as the same-named families of Gray, whilst the Glomeridce 

 comprise the Glomeridce and Zephroniidce of that author, and the Iulidoe his Iulidoe and 

 Graspedesom idee. 



The Polyzoniidce are the Sugentia of Brandt. Thus : 



Gray. Gervais. 



Polyxenidae. ........ Polyxenidse. 



Glorueridae. ") <-,,., 



„ , .., ....... Ulouienda;. 



Zepnronudaa. j 



Polydesmidae Polydesniidaj. 



Iulidse. 1 



n , ■ , ;■ . . . . . . Iulidse. 



Craspedesomidce. J 



None Polyzoniidae. 



M. Brandt (Eecueil, p. 36), composes his "Tribus II" (Chilognatha) of all the Diplo- 

 poda, except the Sugentia. This tribe he divides into three families, — Monozonia, Tri- 

 zonia, Pentazonia. The first of these comprises the Polyxenidce and Polydesmidce of 

 Gray; the second, the Iididce and Graspedesom idee ; the third, the Glomerida>, and Zepdi- 

 roitiieloe of that author. The Sugentia he divides into two sections, the Ommatophora and 

 Typhlogena, which are respectively the Polyzoniidce and Siplionophoridce of Newport. 



Mr. Newport (Linn. Trans., vol. xix), divides all the Chilognatha (including the Su- 

 gentia) into six families,— Glomeridae, Polyxenid.e, Polydesmid.e, Iulid.e, Polyzoniid-e, 

 Siphonophorid.e. Of these, the Glomeridce includes the Glomeridce and Zephroniidce of 

 Gray; the Pol 'ydesmidce the Polydesmidae, and perhaps the Craspedesomidce* of the same 

 author; the Polyxenidce and Iulidas correspond to his families of the same name, whilst the 

 Siphonophoridce and Polyzoniidce are the Sugentia of Brandt. Mr. Newport then associates 

 these six families in three groups, which he calls tribes: 1st. " Pentazonia, Brandt" com- 

 prising the Glomeridce. 2d. "Monozonia, Brandt," comprising the Polyxenidce and Poly- 

 desmidce. 3. " Bizonia, Newport" comprising the lulidce, Polyzoniidce, and Siphonophoridce. 



* It is almost impossible to make out the exact limit of the Craspedesomida; of Gray : it may be that Mr. New- 

 port divides the group intended to be characterized by Mr. Gray, and puts only a part of it into his Polydesmidae, 

 and the rest into his Iulidse. 

 VOL. xiii. — 31 



