404 
CLASS ARACHNIDA. 
a state of repose ; sometimes the first two and the last two, 
sometimes those of the two anterior pairs, or the fourth and 
the third, are the longest. The eyes do not form, by their 
general disposition, a segment of a circle or a crescent. 
They may be divided into three sections : the first, that of 
Tubiteles, or Weavers, has cylindrical spinnerets, col- 
lected in a bundle, directed backwards, the feet robust, and 
the first two, or the last two, and vice versa , longer in some, 
while in others the eight feet are nearly of equal length. 
We shall commence with two subgenera, which, considered 
as to the jaws forming an arch round the tongue, approach 
the filistata, and depart from the following. The eyes are 
always eight in number, disposed by fours on two transverse 
lines. The first, that of 
C lotho, Walck . Uroctea, Diifour , 
is one of the most singular, its forceps are very small, with- 
out denticulations, and but little capable of separation, which 
character approximates this subgenus to the last. The hooks 
are very small. In the short form of the body, and length of 
its feet, it resembles much the spider-crab or Thomisus. The 
relative length of thes^ organs differs little. The fourth pair, 
and then the preceding, are only a little longer than the first 
four legs. The tarsi alone are furnished with prickles. The 
eyes are more remote from the anterior edge of the thorax 
than in the following subgenus, approximate, and disposed in 
the same manner as in the genus mygale of M. Walckenaer. 
Three on each side form an inverted triangle. The other two 
form a transverse line, in the space comprized between the 
two triangles. The jaws and tongue are proportionally smaller 
than those of the last-mentioned subgenus. The jaws have 
on the external side a short projection, or slight dilatation, 
serving as an insertion to the palpi, and terminating in a 
point. The tongue is triangular, and not almost oval, like that 
