Page:Wood 1865 - The Myriapoda of North America.djvu/104

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

POLYZONIDÆ.

Eyes simple, conspicuous.

Eyes eight.

O. bivirgata.

SIPHONOPHORIDÆ.

Eyes none.

Rostrum much shorter than the antennae.

B. Le Contii.

REMARKS ON THE NATURAL ARRANGEMENT OF THE MYRIAPODA.

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 suborders, according as they assign to the Myriapoda the rank of class or order in the zoological scale. Several reasons for following 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