Mr. Brackwarx's Descriptions of new Species of Spiders. 631 
86: breadth of abdomen 3 ; length of an anterior leg fr; length of a 
leg of the third pair Bg. 
Cephalo-thorax oval, convex above, glossy, slightly prominent behind the 
eyes, with a small indentation in the medial line of the posterior region ; 
it is of a dark brown colour. Mandibles conical, armed with teeth on 
the inner surface, and inclined towards the sternum ; they are of a dark 
brown colour, slightly tinged with red. Maxille rather paler than the 
mandibles. Sternum broad, heart-shaped, and convex; it and the lip 
are of a dark brown hue. Legs and palpi reddish brown. First and 
fourth pairs of legs, which are the longest, equal in length, third pair 
the shortest. Tarsi terminated by three claws; the two superior ones 
are curved and pectinated, and the inferior one is inflected near its 
base. Abdomen oviform, convex above, projecting over the base of the 
cephalo-thorax ; it is thinly covered with hairs, and is of a brown co- 
lour, mottled with darker brown. Plates of the spiracles pale yellowish 
brown. | 
The male is darker coloured than the female, and has on the anterior 
part of the cephalo-thorax a strong prominence, deeply indented on the 
sides, on which the eyes are seated. Immediately before each eye of the 
superior pair is a large, obtuse protuberance. Fourth joint of the palpi 
rather larger than the third, projecting a strong apophysis in front, which 
is bifurcated, the inner process being longer and more pointed than the 
outer one; fifth joint oval, convex and hairy externally, concave within, 
comprising the palpal organs; they are highly developed, complicated in 
structure, prominent, with a fine, curved spine at the extremity, and are 
of a red-brown colour. 
Specimens of Walckenaëra turgida were discovered in September and Octo- 
ber 1836, under stones and blocks of wood in the plantations at Crumpsall 
Hall, near Manchester. 
18. Walckenaéra atra, Nigra; mandibulis maxillis pedibus palpisque brunneis. 
| Anterior cephalo-thoracis pars in mare elevata obtusa, indentatione 
utrinque oblonga. 
Length of the female Prth of an inch; length of cephalo-thorax ; breadth 
