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, 

 xvhile 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 



Clotho, Walck. Uroctea, Dufour, 



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 these 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 



