1870. ] REV. O. P. CAMBRIDGE ON NEW ARANEIDEA. 741 
four form nearly a straight row across the upperside of the fore part 
of the caput ; and in front of each lateral eye of this row is another 
nearly contiguous to it, and about an eye’s diameter from the lower 
margin of the clypeus. 
Legs neither very long nor strong; relative length 1, 2, 4, 3, be- 
tween 2, 3, and 4 there is but very little difference; the metatarsi 
of the hinder pair are furnished on the outer sides with ‘ calamistra,”’ 
and the tarsi end with three curved strongly pectinated claws, of 
which the lower one only appeared to differ from the upper ones in 
size. 
Mazille strong and rather long, curved and inclined towards the 
labium, of nearly equal breadth throughout, and rounded at their 
extremities. 
Labium moderately long, broader near its base than at the apex, 
which is truncated. A supernumerary mamillary organ, or pair of 
short united spinners, is situated beneath, or in front of, the usual 
ones, which are rather strong, prominent, and are projected in the 
same plane as the abdomen. 
RHION PALLIDUM, n. sp. (Plate XLIV. fig. 8.) 
Male adult, length ? of a line. 
The general colour of this interesting little Spider is a pale amber- 
yellow, marked and mottled with cretaceous white; the colour of 
the cephalothorax is rather deeper and brighter than that of the 
abdomen, the upperside of which last is almost entirely suffused 
with white, longitudinally and transversely intersected with yellowish 
lines ; the sides of the cephalothorax are slightly radiated with dusky, 
the white being principally in the median line. 
The four eyes of the hinder row are nearly of the same size, the 
two centrals being nearer to each other than each is to the lateral on 
its side; the two eyes forming the front row are the largest of the 
six and widely separated from each other; each is almost, but not 
quite, contiguous to the hind lateral on its side, with which it is 
seated apparently on a small common tubercle. 
The legs are furnished with hairs only; the ‘‘calamistra’’ on the 
metatarsi of the hinder pair are formed by fine hairs not very thickly 
set, nor very conspicuous. 
The palpi are short; the radial is shorter than the cubital, and 
not quite so strong; it has near its upper extremity, rather on the 
outer side, a small but short, conspicuous, bluntish-pointed, promi- 
nent black spine; the digital joint is longer than the radial and 
cubital together, it is oval in form and produced at its extremity 
like the digital joints in the palpi of some species of Tegenaria; the 
palpal organs are well developed but simple in structure, consisting 
apparently of a corneous lobe with a roundish surface, and furnished 
with a slender black filiform spine, which issues from near their 
inner extremity, and, curving round on the inner side of the digital 
joint, terminates in a fine point near their base on the outer side. 
Falces moderate in length and strength, and of the ordinary form. 
Sternum heart-shaped. 
