South African Arachnida. 215' 



which the posterior one is largest and terminates the single series, 

 being followed posteriorly by a double row of about 3 outer and 

 3 inner teeth. Ventral finger only slightly curved, except at the 

 apex, with 3 sharp teeth, the middle tooth small ; the upper edge of" 

 the finger slightly convexly elevated for some distance in front of the- 

 distal tooth. 



Fig. 4. — B. crepiduUfera, n. sp. 



Flagelhnn membranous, transparent and colourless, without longi- 

 tudinal rib, the large opening directed inwards, the superior edge 

 more convex than the lower edge, the distal end pointed ; the free 

 edges of the opening lacerated distally, only a little involuted above 

 and below ; anteriorly the flagellum is hollow and rotatably attached 

 by a narrow stalk to the inner side of the upper finger just behind 

 the level of the large posterior tooth of the single series. 



Cephalothorax provided with a few medium-sized spines near the 

 sides and in front scattered amongst the very short and numerous 

 cylindrical bristles, the row at the hind margin composed of longer 

 and slenderer spines than in namaqicensis. 



Abdomen. — The 2 clusters of hairs on under surface of second 

 segment meeting distally in the median plane to form an arch, each 

 cliTSter composed of 3 long, contiguous, filiform, curved hair- 

 structures. 



Pedipal;ps with the spines on the under surface of the tibia slender, 

 those on the metatarsus not distinctly distinguishable from the long 

 cylinder-bristles of the under surface. 



Total length Si-lQi. 



? . A few 2 or young from the Worcester District, probably 

 belonging to this species, differ from the ^ in having much shorter 

 limbs, while the longer spines of the upper surface of the body are 

 replaced by slenderer cylindrical bristles. The dentition is normal, 

 the single series being composed of 2 large teeth, followed by a small 

 one, and another large one. The spines on the ventral side of the 

 pedipalps are shorter and distinct, even on the metatarsus, which is 



