170 
AGELENIDvE. 
Aranea terrestris, Wider, Museum Senckenb., Band i, p. 215, taf. 14, fig. 10. 
Amaurobius terrestris, Koch, Die Araclin., Band vi, p. 45, tab. 192, figs. 463, 464. 
— subterraneus, Kocb, Uebers. des Arachn. Syst., erstes Heft, p. 15. 
—■ tigrinus, Koch, Uebers. des Arachn. Syst., erstes Heft, p. 16. 
Length of the female, ^ths of an inch; length of the cephalo-thorax, !th, breadth, 5 3 e tlis; 
breadth of the abdomen, 3 th; length of a posterior leg, fths; length of a leg of the third 
pair, j. 
The cephalo-thorax is large, convex, glossy, compressed before, somewhat depressed and 
truncated in front, and rounded on the sides, which are depressed and marked with slight 
furrow's converging towards a narrow indentation in the medial line; the falces are powerful, 
vertical, triangular, very prominent at the base, and provided with two rows of teeth 
and a dense fringe of hairs on the inner surface; the maxillae are strong, and fringed 
with hairs at the extremity, on the inner side ; the sternum is heart-shaped and glossy, with 
slight prominences on the sides, opposite to the legs ; the legs and palpi are robust, and 
provided with hairs and spines; each tarsus is terminated by three claws; the tw'o superior 
ones are curved and deeply pectinated, and the inferior one is inflected near its base, which 
is furnished with two pairs of fine teeth; the palpi have a curved, pectinated claw at 
their extremity. These parts, with the lip, are of a dark, reddish-brown colour, the legs and 
palpi being the reddest, and the anterior part of the cephalo-thorax, the falces, maxillae, and 
lip much the darkest. The abdomen is oviform, hairy, broader at its posterior than at its 
anterior extremity, and projects a little over the base of the cephalo-thorax; it is of a 
yellowish-brown colour, spotted with black, and a black band, tapering from its anterior 
extremity to the spinners, extends along the middle of the upper part; on each side of 
this band there is a series of short, oblique, yellowish-brown lines, which, in some individuals, 
unite in the posterior region, forming angles w'hose vertices are directed forwards; the 
black spots on the under part are few in number and minute ; the superior spinners, which 
are the longest, are triarticulate, and have the spinning-tubes distributed on the inferior 
surface of the terminal joint; the sexual organs are glossy, of a red-brown colour, with 
a longitudinal septum in the middle ; and the branchial opercula have a pale-yellow hue. 
The sexes are similar in colour, but the male is the smaller. The cubital and radial 
joints of its palpi are short; a large apophysis occurs on the outer side of the former, 
and the latter projects two apophyses from its extremity, one on the outer side, which 
is acute, and the other in front, which is obtuse and short; the digital joint is of an oblong- 
oval form, and is compact and pointed at its extremity; it is convex and hairy externally, 
concave within, comprising the palpal organs, which are highly developed, complicated 
in structure, with a bold, obtuse protuberance on the outer side, and a curved, finely pointed 
spine on the inner side ; they are of a dark, reddish-brown colour. 
A description of this interesting species, which was discovered in the spring of 1826, 
beneath loose fragments of rock on Snow'don, in Caernarvonshire, was originally given in the 
£ London and Edinburgh Philosophical Magazine,’ under the name of Clubiona saxatilis. 
The result of an examination of specimens procured afterwards in various parts of North 
Wales, Lancashire, and Yorkshire, was its removal to the genus Drassus (‘Researches in 
