The arachnid are followed by the myriapoda (centipedes, etc.), and these by the insecti or true insects.
His comparison of the Arachnid appendages with those of insects and Crustacea is very curious.
It treats of curious animals which the author considers as more nearly allied to the Insecta than to the Crustacea or Arachnid.
The characteristics of the median eyes must then be especially sought for in the arachnid group.