Remarks on the Chelonetlhu. 
By 
C. J. With. 
This little treatise consists of three parts, namely 1) historical 
studies on the development of our knowledge, as far as the antennae 
of the Chelonethi are concerned, 2) studies on the most remarkable 
family the Feaellaceae Ell. first established by Ellingsen and 3) 
description of a few species from the British Museum. 
1. Historical remarks about the antennae. 
The fact that scarcely any of the naturalists, who studied these 
organs had a proper knowledge of their predecessors and contem- 
poraries, is rather odd and to be regretted. A few authors gave 
already in the first half part of the past century a rather good 
description of these structures in different forms, but a naturalist 
has nevertheless as lately as in 1889 represented these very facts 
as being new. It was chiefly in the years from 1882 to 1888, 
that several naturalists studied these organs, partly in single forms 
partly from a comparative point of view; but all these broke entirely 
new ground, as the one did not know the result, at which the others 
had arrived, and was consequently unable to derive full advantage 
of the progress, which was necessarily very much retarded. And 
it is only lately, that the real structure of these organs has been 
understood by most workers on the Chelonethi, though it was so by 
the most advanced more than twenty years ago. The first author, 
who saw, that each finger of Chthonius orthodactylus Leach is 
Vidensk. Meddel. fra den naturh, Foren. 1908, å 
