SYSTEM OF INSECTS. 385° 
the Acaridea, Sironidea, Phalangidea, and part of the 
Scorpionidea of Mr. MacLeay, and, with some exceptions, 
of the Linnean genera Acarus and Phalangium. This last 
tribe (for with Linné, I include Chelifer and Obsidium in 
the Phalangidea,) on one side approaches Scorpio by 
Thelyphonus, and on the other the Aranidea by Gony- 
leptes; or, according to Mr. MacLeay, the transit is to 
both by Galeodes*. But as there is reason for thinking 
that this last belongs to the Pulmonary Arachnida», and 
forms a peculiar type in that Class, I think the transit 
from the one to the other is as above stated... The folded 
abdomen of Gonyleptes seems much to correspond with 
that of the cancriform spiders (pera cancriformis, &c.). 
Der. Metamorphosis complete, 
Body consisting of one or two principal seg- 
ments. “" 
Mouth various‘*. 
Antenne obsolete, or represented by mandibles 
Legs mostly eight, but in a few six only?. 
Polypods. ‘This suborder consists of Dr. Leach’s 
Class Myriapoda, or the Chilognatha and Chilopoda of 
Latreille, corresponding with the Linnean genera Julus 
and Scolopendra. Mr. MacLeay has arranged them in 
the same Class with the Hexapods, and connects them 
with the Anoplura by means of certain intestinal worms 
of an indistinct annulose structure * (Hntozoa Nematoidea 
Rud.), in which the sexes are dicecious, and some of 
* Hor. Entomolog. 331. Pao ull op..22, note-*. 
¢ Tbid. p. 472— 4 Thid. p; 654. 
* See above, p. 229. 
VOL. LV. £4, O 
