106 T. THORELL, 
and I think it is only the relationship, in which they have been placed to 
the Urocteoidæ, that has caused them to be foisted, as a sort of appendage 
to these latter, into the sub-order Tubitelariæ. The characteristic features 
(the structure of the mandibles), which they have in common with the Fili- 
statoide and Urocteoide, belong equally to the Scytodoidæ. Their entire ap- 
pearance, especially the long, fine extremities, indicate beyond all doubt 
their place to be among the Retitelarie, and of these the Scytodoide must 
be considered as nearest akin to them. As in the Scytodoide, the tarsus 
is augmented with a little separate claw-joint, and even in the structure of 
the mouth they seem to approach nearest to the Scytodoide, though the 
lip is separated by a suture from the sternum, as in the Theridioidæ. With 
the Urocteoide, in spite of the considerable difference in their general 
appearance, they show several striking points of contact, not only in the 
similar position of the eyes, and in the mandibles being connected towards 
the base and having a very small claw (as is also the case with most Scy- 
todoide and Filistatoide), but even in the structure of the female’s palpi, 
which are thickened towards the extremity, and armed with a powerful, pecti- 
nated claw. The eyes are 8 in number, arranged in two transverse rows, 
of which the posterior row is strongly curved forwards, so much so that the 
eyes may also be said to form three rows. | 
But the Enyoidz differ from the Urocteoide and all the Retitelariæ, 
and indeed, as far as I know, from all other spiders, in the structure of 
their spinners. Seen in profile, these organs display a considerable resem- 
blance to those of the Urocteoidæ, for we first remark a pair of long spin- 
ners, which appear to consist of a short basal joint, from which the remaining 
part of the spinner issues in the form of a compressed longer joint, somewhat 
tapering towards the extremity. But whereas in the Urocteoidæ the superior 
(posterior) pair of spinners are the longest, in the Hnyotde the inferior pair 
are incomparably larger than the others. Moreover in the Enyoidæ — at 
least in the species, Enyo greca C. KocH, which I have had the opportu- 
nity of examining — the basal part of the inferior spinners is common to them 
both: seen from beneath it is almost inversely heart-shaped, rounded off in 
front and cut transversely behind, with an incision in the edge, on both 
sides of which the two real spinners are inserted. Thus seen, they lie in 
tolerably close juxtaposition, are about as long as the basal piece, but taken 
together narrower than this, about double as long as broad at the base, 
and tapering a little towards the extremity. The basal piece must be con- 
sidered as a part of the abdomen, as it has not divided itself into two se- 
parate basal joints for the spinners. The spinner itself is directed slightly 
upward, as in Uroctea, and appears to consist of two joints, of which the 
