South African Hydrachnids. 461 



The most evident characteristic of this species is the shape of the 

 genitcd pore-plates, which distinctly differs from that of all the known 

 African species. The genital opening is large, with large valves, 

 which are surrounded by the inner ends of the pore-plates. These 

 latter taper rapidly, the anterior margin sloping strongly backwards. 

 Both margins are sinuous, converging to an acute angle with obtuse 

 tip (fig. 44). 



The " anus " is situated near the hind end of the body. 



The maxillary sinus and lip are small. 



The maxillary palps (fig. 45) have the ordinary shape without 

 important deviations. The fourth segment is of uniform thickness, 

 with 2 small hairs on the extensor side near the distal end, a 

 moderately long, straight spine near the flexor side, and 2 small hairs 

 on the antagonistic portion. The fifth segment (claw) is thick, bifid, 

 and possesses a long hair on the convex extensor side and a strong 

 spine at the middle of the bent flexor side. 



The legs show no very remarkable characteristics. 



Locality. — Mr. Purcell collected 1 J in a fresh- water pond near 

 Eetreat Vlei, Cape Mats (October, 1900) (Eeg. No. 4634). 



Paris, May 1, 1902. 



