I915.] F.H. Gravety: Indian Mygalomorph Spiders. 2605 
The chelicerae are armed with about ten inner but no outer 
teeth, and are provided with a rastellum whose spines are some- 
what long and slender. 
There is no stridulating organ. 
The tarsus of the palp is lobed on the inner side below. The 
style of the palpal organ (fig. 2b) is more or less lamelliform and 
parallel-sided throughout the greater part of its length, and is 
twisted on its own axis through about go°; distally it is sharply 
pointed. 
The legs are spiney, with a series of very stout spines on the 
tibia and metatarsus. The tibia of the first legs is armed on the 
inner side near the end with two stout apophyses, of which the 
distal is ventral to the other (fig. 2a). They curve towards one 
another as a whole, but the extreme apices are slightly turned in 
the opposite direction. The distal part of each, which is greater in 
the proximal than in the distal, appears to be jointed on to the 
basal part. From this it seems probable that the former is move- 
able in life. I do not remember to have heard of any other Arach- 
nids with jointed apophyses; but the jointed setae of Nereidiform 
Polychaet worms and the jointed tooth found on the mandibles of 
most Passalid beetles, afford instances of similar jointing of chiti- 
nous structures in other groups. 
This species differs from S. sulivani chiefly in the presence of 
apophyses on the tibiae of the first legs. 
Group SASONEAE. 
Genus Sason. 
Represented by specimens of S. cincttpes, Pocock, from 
Peradeniya in Ceylon, and by one undetermined specimen from 
the Nicobars. S. cincttpes lives on moss-covered rocks or walls 
where it constructs a curious flat, more or less 8-shaped nest. 
The upper part of this nest consists of two rounded flaps hinged 
together along their contiguous borders, these borders forming 
the cross-piece of the eight. The double trap-door is attached to 
the basal part of the nest on either side of the cross-piece. 
Subfamily AVICULARIINAE. 
Five of the groups of this sub-family recognized in Simon’s 
“Supplement” occur in the Indian Empire, and of these four 
are only known from the Oriental and Australian Regions. The 
fifth is the most primitive of them all, and has a much wider dis- 
tribution; it may be looked upon as the ancestor of the other four. 
This group, the Ischnocoleae, is almost confined in the 
Oriental Region to the Indian Peninsula and Ceylon. The genera 
which occur there are found nowhere else, except perhaps in the 
Eastern Himalayas and Burma. In Simon’s arrangement they are 
scattered among genera from other parts of the world; but when 
taken by themselves they are found to fall into line, not only with 
