196 
The 4 movable tergites of the abdomen. 
Generally each with 2, partly transverse, partly longi- 
tudinal fissures on each side; the hindmost, 4th tergite 
(hindmost anal plate) altogether with 2 transverse fissures. 
Cephalothorax and the foremost coalesced 
abdominal tergites. 
With some spread fissures going in different direc- 
tions and situated quite forward at the anterior margin, 
at the posterior margin and at the lateral margins. 
The mentioned fissures occurring on the body are 
all comparatively large. 
Phalangium and Nemastoma are, however, by far 
not sufficient to give a full idea of the occurrence of 
these organs in this order, the numerous types of which 
differ from each other according to manifold structural 
features. I am, however, bound to leave this rather ° 
difficult investigation to others who are disposing of a 
richer material of different forms (Sironoidæ, Trogu- 
loide etc.) I shal merely add that I have found a 
great number of small longitudinal fissures spread 
on the upper side of the tibia in Mastobunus tuber- 
culifer Luc., and the animal does even belong to the 
same family as Phalangium cornutum. In Pachyloides 
uncinatus W. Sor., belonging to Opil. Laniatores, we 
find other structures differing much from the examined 
Opil. Palpatores; thus very small, spread longitudinal 
fissures on the metatarsus; but owing to the peculiar, 
thick integument it is very difficult to examine them. 
B. Other Sense-Organs. 
Of such are known but the eyes in this order (not 
counting the sense-organs on the ovipositor of the 
female). In two types I have found very remarkable 
hairs deserving to be treated more closely and of 
