Mr. BrackwaLv's Descriptions of new Species of Spiders. 623 
a curved claw at their extremity. Eyes disposed on the fore-part of the 
cephalo-thorax in two transverse, curved, nearly parallel rows, whose con- 
vexity is directed backwards ; the lateral eyes, which are seated on a small 
eminence, and are nearly contiguous, are the largest, and the interme- 
diate ones of the anterior row the smallest of the eight. Abdomen short, 
broad, thickly covered with hairs, convex above, projecting over the base 
of the cephalo-thorax ; it is of a dull blackish brown colour, interspersed 
with obscure, yellowish brown spots, which are most conspicuous on the 
sides ; the under part is the palest. The spinners are arranged in a trans- 
verse row immediately below the anus ; the exterior ones, which are much 
the longest, are triarticulate, and have the spinning-tubes disposed along 
the inferior surface of the terminal joint ; second joint of all the spinners 
reddish brown, the other joints yellowish white. Sexual organs promi- 
nent. Plates of the spiracles whitish. 
Females of this species were discovered in February 1837, under stones on 
Gallt y Rhyg, a mountain in Denbighshire, near Llanrwst. 
11. Agelena nava.. Saturaté brunnea fere nigra. 
Length of the female, not including the spinners, Psth of an inch; length of 
cephalo-thorax 3; breadth 3%; breadth of abdomen jy; length of a 
posterior leg ; length of a leg of the third pair Pg. 
Anterior part of the cephalo-thorax compressed ; sides depressed, marked with 
furrows diverging from the upper part to the margins; a row of fine 
bristles, directed forwards, extends along the middle, and in the posterior 
region, which is depressed, there is an indentation. Mandibles strong, 
conical, vertical. Maxillæ short, convex at the base, round at the extre- 
mity, and inclined towards the lip, which is nearly quadrate, being rather 
broader at the base than the extremity. Sternum heart-shaped. These 
parts are glossy, and, with the legs and palpi, are of a dark brown colour, 
the margins of the cephalo-thorax and the base of the lip being much the 
darkest. Fourth pair of legs the longest, then the first, third pair the 
shortest. Tarsi terminated by two curved, pectinated claws. Eyes dis- 
posed on the fore-part of the cephalo-thorax in two transverse, curved 
