274 Mr. Newport on the Class Myriapoda, Order Chilopoda, 



may be remarked, that the structure of the internal parts of the mouth in the 

 Scolopendridce and GeophiUdce seems equally fitted for taking liquid as well 

 as solid aliment. On this account I have been unable to adopt his primary 

 division into masticating and sucking Myriapoda in my arrangement of this 

 class, but have followed his plan closely in the formation of the families, sec- 

 tions and genera and in the characters assigned to them. His tribes I have 

 considered, with Latreille, as distinct orders, and his families as tribes. The 

 alterations made in the arrangement of the genera are those which Brandt 

 himself would have followed, had he assigned to this class a position below 

 the Crustacea instead of above them, a situation which the close affinities they 

 bear to the Annelida fully justify me in proposing. The circumstance which 

 led Brandt to place his Pentazonia at the bottom of the order Chilognatha 

 was their close affinity with the Crustacean family Oniscidce ; and it is this 

 very circumstance which now leads me to place them at the top. Those 

 genera which seem to have the closest connexion with the Annelida are the 

 vermiform lulidoe. These not only have an affinity with the Annelida in the 

 situation of their respiratory organs near the median line on the ventral sur- 

 face of the body, but also in their multitude of segments, and in the number 

 of new segments periodically acquired. Of this family the Spirostrepti seem 

 to occupy the lowest position, on account both of the number and simplicity 

 of their segments. The Pentazonia, which have the smallest number of seg- 

 ments, appear on that account to connect the Chilognatha with the Chilopoda. 

 These are the views adopted in the following synoptic table of arrangement 

 and characters of the genera. 



Synopsis Generum. 



Ord.l. CHILOPODA, Z,a^r. — Caput latum, prominens. Corporis segmenta inaequalia; 

 singula par unicum pedum ad latera segmentorum insertorum gerentia. Mandibulae 

 prominentes, acutae, falciformes. Organorum sexualium apertura ad extremitatem 

 analem. 



Trib. 1. ScHizoTABSiA, Brandt.— Kniennai pluri-articulatae, graciles, corpore 

 longiores. Tarsi longi, pluri-articulati, inaequales. Oculi compositi, pro- 

 minentes, globosi. 



