191 
mentioned that this remarkable species is devoid of 
stridulating apparatus). 
H. Anus. 
In Rhax annulata? the anus takes up hardly 
the lowest third of the height of the last segment; 
in the other, before mentioned forms, known to me, it 
takes up from at least 2/3 till almost the total height of 
the whole segment. 
I suppose that, if the characters pointed out here 
for some of the genera (respiratory organs, stridulating 
apparatus, the basis of the tarsus, rostrum and anus, 
besides the but indicated difference in the structure of 
the apical part of the maxillary palpi) together with the 
formerly known characters are going, seconded by a 
sensible valuation of the characters, to be examined on 
a large material, a basis may be gained sufficiently 
extensive to the establishing of an improved system of 
this interesting order. I find grounds to believe that 
the shape of rostrum, in particular, will become of the 
greatest importance to the natural arrangement of the 
genera, often much more important than the number of 
joints in the tarsi. 
V. Opiliones. 
Sorensen, W.: Opiliones Laniatores Musei Hauniensis 
(Naturh. Tidsskr. 3. Ro B. XIV, 1884, p. 555—646). 
A. Lyriform Organs. 
Gaubert (op. cit. p. 82—83) has studied Phalangium 
opilio and has found these organs only on the Ist and ed 
