neriEne. 
259 
organs, which are highly developed, very prominent, and complicated in structure, having a 
large, scale-like process on the outer side, extending beyond the end of the joint, and a filiform, 
curved, black spine on the inner side, which passes under the radial apophysis and along the 
margin of the scale-like process to its point; the colour of these organs is reddish and 
yellowish-brown intermixed. The abdomen is oviform, hairy, convex above, projecting over 
the base of the cephalo-thorax, and has a brownish-black hue ; that of the branchial opercula 
being dull-yellow. 
According to M. Wider, the female is without the prominent, pointed process near the 
middle of each falx, in front; it may also be distinguished from the male by the sexual 
organs and the structure of the palpi. 
Early in May, 1854, adult males of this species, which has all the characteristics of a 
Neriene, were taken by the Rev. Hamlet Clark in Norfolk. 
Neriene affinis. PI. XYIII, fig. 175. 
Neriene affinis, Blackw., Annals and Mag. of Nat. Hist., second series, vol. xvi, 
p. 121. 
Length of the male, yth of an inch; length of the cephalo-thorax, Ath, breadth, 7B th ; 
breadth of the abdomen, TB th ; length of a posterior leg, ~ths; length of a leg of the third 
pair, ^ths. 
The legs are provided with hairs, and have a bright, yellowish-red tint; the fourth pair 
is the longest, then the first, and the third pair is the shortest; each tarsus is terminated by 
three claws; the two superior ones are curved and pectinated, and the inferior one is inflected 
near its base. The palpi are long, and resemble the legs in colour, but are somewhat paler ; 
the humeral joint is slightly curved towards the cephalo-thorax, and the cubital and radial 
joints are clavate, the former having a conical, pointed process projecting at right angles 
from its extremity on the under side, and the latter a very minute, bifid, black apophysis at 
its extremity in front; the digital joint is small, oval, convex and hairy externally, concave 
within, comprising the palpal organs, which are moderately developed, not very complicated 
in structure, and of a pale, red-brown colour. The cephalo-thorax is oval, convex, glossy, 
with slight furrows on the sides, converging towards an indentation in the medial line ; the 
falces are powerful, subconical, vertical, convex at the base in front, divergent at the 
extremity, armed with teeth on the inner surface, and have a conical, tooth-like process near 
the middle, towards the inner side, and numerous minute, pointed prominences in front; the 
maxillae are convex at the base, enlarged where the palpi are inserted, and at the extremity, 
which has a pointed process on the outer side, and incline towards the lip, which is semicir¬ 
cular and prominent at the apex; and the sternum is broad, glossy, and heart-shaped. These 
parts have a reddish-brown colour, the lip and anterior part of the cephalo-thorax being much 
the darkest. The four intermediate eyes form a trapezoid, the two anterior ones, which 
constitute its shortest side, being the smallest and darkest of the eight, and those of each 
