202 



Falconer : Abnormality in Spiders. 



•on May 22nd, 1904. It is still in my possession, but has not 

 yet been described or recorded. 



The cephalothorax (fig. 5) is raised behind the eyes as in a 

 normal male (fig. i), but the elevation is much less lofty, not 

 so massive and totally devoid of the lateral impressions which 

 are not so conspicuous in the latter, while the descent to the 

 ocular area is also less abrupt. Both palpi are of the male form, 

 but some of their parts, including the palpal organs, are ab- 

 normal in shape, size and structure. In a normal example 

 the tibial joint (fig. 3c) is shorter than the patella, and 

 provided at the extremity with an angular prominence directed" 

 outwards, and ending in a small pointed apophysis, (fig. 3a), 



REFERENCES 



(Edothorax retusus Westr. 

 NoKMAL Specimen. 



Fig. 1.— Cephalothorax of Male. Fig. 2.— Epigyne of Female. 



Fig. 3. — Right palpus from outside ; (a) angular prominence and (6) curved spine of 



tibial joint (c). 

 Fig. 4. — Tibial joint of left palpus from above. 



Abnormal Specimen. 



Figs. 5 to 8 correspond with those above, (c) in 8 being false articulation of tibial 



joint of left palpus. 

 Fig. 9.— .Ut/rt scgmentata Clerck, male, abnormal tibial joint and palpal organs of right 



palpus. 



a little distance from which is a small, black, sharp-pointed, 

 slightly curved spine, directed downwards (fig. 36). In the 

 abnormal specimen (figs. 7 and 8), both palpi are without the 

 angular prominence, possessing only the curved spine (marked 6); 

 the right palpus is equal in length to the patella (fig. 7) ; the 

 left palpus is in normal proportion, but towards the extremity 



Naturalist, 



