REMARKS ON THE NATURAL ARRANGEMENT OF THE MYRIAPODA. 239 



Sub Ord. SUGENTIA. 

 Parts about the mouth consolidated into a tubule fitted for the imbibition of liquid food. 



fam. polyzonid^:. 



Eyes simple, conspicuous. 



Gen. Octoglena. 

 Eyes eight. 



0. bivirgata. 



Fam. SIPHONOPHORID.E. 

 Eyes none. 



Gen. Brachyctbe. 



Rostrum much shorter than the antennae. 



B. Le Gontii. 



REMARKS ON THE NATURAL ARRANGEMENT OF THE MYRIArODA. 



Since this memoir has gone to press, the author has had the opportunity of examining 

 some specimens of the Pentazonia of Brandt, and has been led thereby to extend and 

 somewhat modify the classification of the Myriapoda as adopted in the body of the paper. 

 It was stated that all modern authors, except Mr. Brandt, agree in dividing the Myriapoda 

 into the two primary groups, Chilopoda and Chilognatha, calling them orders or subor- 

 ders, according as they assign to the Myriapoda the rank of class or order in the zoological 

 scale. Several reasons for followiifg this were adduced, but in one particular I was led 

 into error by a mistake of Mr. Newport. It was in the assertion that the Diplopoda* have 

 always the genitalia in the anterior portion of the body, which is incorrect. Nevertheless, 

 the appearance and structure of the two orders are so unlike that there can be no doubt 

 of their distinctness. There is one difference which has never had the prominence given 

 to it that, as it seems to me, it deserves. In the Chilopoda the head is always developed 



* Chilognatha and Diplopoda arc used here as .synonymous, interchangeable terms — not with the meaning 

 assigned to them in an earlier part of the memoir. 



