On EUROPEAN SPIDERS. 111 
in Uroctea, along the underside of the elongated 2" joint provided with spinning- 
tubes, thereby plainly showing the relationship of these spiders to the Hersi- 
lioide and Agalenoide. 
That they cannot however be united with either of these two fami- 
lies, follows from certain peculiarities in their organisation. The cephalo- 
thorax is short, reniform or inversely heart-shaped. The first joint of the 
superior spinners is very short, whereas the second is long, compressed, 
and almost lancet-formed. The anus is surrounded by a double crown of a 
peculiar kind of bristles, which, as far as I am aware, has not been found 
in any other spider, and whose functions are unknown ?. Respecting the 
different views, that have previously to the present time been maintained on 
the subject of the systematic position of the Urocteoidæ, we refer to what 
has been stated above, p: 105. 
Beside Uroctea Dur. or Clotho (WALCK.), I include in this group only 
the genus Œcobius Luc. ?. That the 6-eyed genus Sicarius WALCK. (Tho- 
misoides NIC.), which SIMON ?) refers to his "Clothéiens", i. e. our Urocteoide 
and Zmyeide, should belong to that group, seems to me highly improbable; I 
imagine that it ought to be referred to the Thomisoidæ, with which also 
according to GAY and NICOLET it is most nearly related ‘). 
Uroctea and (Ecobius are easily distinguished in the following manner: 
1. Oeuli omnes rotundati, convexi. Cephalothorax sub-reniformis. Pedes ro- 
busti. Mamillæ superiores subtus tubulis textoriis vestiti. . . 1. Uroctea. 
2. Oculi intermedii postici sub-trianguli, deplanati. Cephalothorax inverse sub- 
Conan, les mraGllones, o a s 5-6 o9 6 a 0 s n B QBUS 
Gen. 1. UROCTEA Dvr. (1820). 
Deriv.: ovoc, tail; xzeí(c, comb. 
Syn.: +1809. Clotho Warck., in Larr., Gen. Crust. et Ins., IV, p. 370. 
1820. Uroctea Dur., Descr. de cinq Arachn. nouv., p. 198. 
1) Durour, who did not succeed in observing any spinning-tubes on the spinners 
of Uroctea, and aecordingly supposed that these organs were not the true spinning 
apparatus, believed that "les véritables filiéres" were to be found between the cir- 
cles of bristles, and that the bristles themselves "servent de peigne ou de carde pour 
enchevétrer les fils dont l'araignée fabrique sa demeure." (Descr. de cing Arachn. 
nouv., p. 200). 
2) Explor. de l'Algérie, Arachn., p. 232. 
3) Hist. Nat. d. Araignées, p. 156. 
4) Gar, Hist. fis. e. pol. de Chile, Zool., III, p. 351. 
