REV. O. P. CAMBRIDGE ON NEW BRITISH SPIDERS. 441 
in Westring's ‘Araneæ Suecicz'), by the peculiar form and character of that portion 
of its. cephalothorax; the radial joints of the palpi also furnish a very distinguishing 
character. 
NERIENE ARUNDINETI, n. sp. 
Neriene arundineti, L. Koch in MSS. 
Female adult, length +, of an inch. 
In form and colour this spider closely resembles N. livida, BL, but may easily be 
distinguished by its much smaller size, and by its abdomen being blacker, wanting the 
pale markings and red-brown impressed dots on its upperside, as well as by its abdomen 
being more perceptibly clothed with long prominent pale hairs. From its size it might 
at first sight be thought to be the female of N. neglecta (Camb.) described post, which 
it also resembles in colouring ; but a careful examination shows that the relative position 
of the eyes of the hind row is different in that species; the two central ones of that row 
are further from each other than each is from the end one of the same row on its side, 
while in the present species the four eyes of that row are equidistant from each other. 
The falces also of the present species have not the depression at their upper extremities 
or on the inner side which exists in N. livida and also, though in a more circumscribed 
form, in N. neglecta. The external sexual organs were rather obscured by some foreign 
substance adhering to them; but they did not appear to present any thing remarkable in 
size or form, though probably, if free from obscuration, they would be found to be speci- 
fieally characteristic. 
The only specimen that has come under my notice was captured by myself at Blox- 
worth, in a marshy place, in 1866 ; and Dr. L. Koch says it is identical with a species he 
finds near Nürnberg, and to which he has in his MS. notes given the specific name 
“ arundineti,” which T have therefore adopted. 
NERIENE CLARKII, n. sp. (Pl. 56. no. 30.) 
Male adult, length 7, of an inch. 
Cephalothorax short, broad-oval, smooth ; colour yellowish brown; the furrows defining 
the caput and thoracic segments tolerably defined and dusky, as also is the normal 
longitudinal depression of the hinder part. The profile forms a slightly sinuous line, 
arching a little from the eyes to the occiput, then dipping a very little in a hollow line 
to the abdomen. Clypeus higher than the length of the space occupied by the four 
central eyes; it is nearly perpendicular, and very slightly, if at all, prominent. 
Eyes eight, in two transverse rows just above and below the fore margin of the caput ; 
hind row straight, front row very slightly curved, the curve directed forward; they are 
nearly equal in size, the middle anteriors being rather the smallest; those of the hinder 
row are equidistant from each other, and the middle ones of the front row are rather nearer 
together than each is to the end one on its side. Those of the lateral pairs are nearly 
contiguous, and are seated on a common black tubercle; the middle posteriors are edged 
VOL. XXVII. 3 N 
