542 
W. F. rUECELL. 
posterior part of the body. It is of a pronounced arborescent 
form, but only its larger branches are provided with spines. 
Tlie spines which line the various trunks within are 
arranged in longitudinal rows (fig. 4, S 2 )i.), and are connected 
at apex by transverse threads {thr.), which, however, also 
anastomose with adjacent threads, the whole arrangement 
being' very much as in Dysdera (see Lamy :02, pp. 180 and 
181, figs. 20 and 21). The larger tracheal branches iu the 
abdomen have similar spines, but the finer branches or 
tubules in the abdomen and all the tubules in the cephalo- 
thorax have the transverse threads only, but no spines. 
Each of the short main trunks (text-fig. 16, c. tr.) is also 
produced laterally, together with the pedicel and spiracle, 
beyond the points of origin of the three principal branch 
trunks to form a small but very curious, lateral pocket 
(fig. 9, 1. p.), indicated by Bertkau in his two figures. This 
pocket is divided into a higher posterior and a lower anterior 
compartment, each compressed from before and behind. The 
posterior compartment (fig. 8, p. c.) is provided with anasto- 
mosing spines, directly continuous with those of the main 
trunk, along its upper and medial edges only (■spb), the rest 
of its surface being spineless but much crumpled. It gives 
off tlu'ee small branches, viz. one from the upper edge in an 
antero-lateral direction, and one each from the upper lateral 
and medial angles. These soon subdivide and end in fine 
tubules; they are shown in fig. 9, and have also been indi- 
cated in Bertkau’s figures. 
The anterior compartment (figs. 6 — 8, a. c.) of the lateral 
pocket is lined with anastomosing spines on its anterior side 
(fig. 8, tipi.), but the upper part of this side and that of the 
posterior side is furnished with short sharp spines, the rest 
of the posterior surface being spineless but much crumpled. 
From the upper edge of the compartment two (iu the male) 
or three (in the female) peculiar stout rods or processes {rd.) 
of the cuticula project downwards into the lumen of the 
compartment, each being armed at the base with some 
