740 REV. 0. P. CAMBRIDGE ON NEW ARANEIDEA. [Nov. ], 
issuing from its most prominent part; the radial is large, very pro- 
minent and obtuse above, somewhat blunt-conical in form, and armed 
with hairs, long spines, and strong spiny bristles ; the digital joint is 
small, oblong-oval; the palpal organs are well developed and com- 
plex (though compact), with small corneous processes and spines ; 
these organs are directed outwards and are jammed up against the 
radial joint, seeming as though issuing from or articulated to it. 
The falces are set back rather far beneath the fore part of the 
caput, the clypeus being low and retreating, owing to the promi- 
nence of the upper fore part of the caput; they are inclined back- 
wards towards the maxillee, moderate in length and strength, very 
slightly divergent and armed near their inner extremities with a 
row of curved spiny bristles, apparently in place of the teeth usually 
occupying that situation; the colour of the falces is yellow, tinged 
with brown, and that of the mawille, labium, and sternum is yellow ; 
the form of the sternum is heart-shaped, rather pointedly produced 
behind. 
The abdomen is of an oval form, pointed behind; it is of a dull 
yellow colour, mottled (chiefly on the sides) with cretaceous white ; 
the fore part of the upperside has a broad marginal dark-brown 
band of a somewhat horseshoe form with bold nail-like points of 
yellow distributed along it; between the extremities of this band and 
about the centre of the upperside of the abdomen is a large roundish- 
oval blotch of the same colour, also charged with some similar 
yellow nail-like dots; another blackish patch follows each extremity 
of the horseshoe band, and behind each of these again is another 
dark dot; from allof these dark markings spring some strong, erect, 
bluntish spines, varying a little in length and strength, and sur- 
mounted with long tapering bristles directed backwards ; the spines 
which issue from the patches immediately succeeding the horse- 
shoe band are the strongest, blackest, and most conspicuous ; these 
are obtuse at their extremities and devoid of a terminal bristle, per- 
haps accidentally broken off (7). 
An adult male of this puzzling Spider was contained in a collection 
of Spiders received from Mr. Nietner, from Ceylon, in 1869. Iam ; 
inclined to think that it should be included in the family Epeirides, 
although the slenderness and armature of the legs, as well as the form 
of the maxillz, connect it closely with the Theridides; the form of 
the cephalothorax and the tarsal claws, however, seem to connect it 
more nearly with the former; in which family I have now provi- 
sionally included it. Nothing is known of its habits. 
Family ——? 
Nov. gen. Ruron (nom. propr.). 
Characters of the Genus.—Cephalothorazx short, rather flattened 
above, rounded on hinder margin, and a little compressed laterally 
at the caput, which is broadish and truncated before. 
Eyes six in number, rather large and not greatly unequal in size ; 
