300 Dr. A. Gunther on an apparently new Species of Spider. 



is received in a sheath at the lower end of the falces, the edges of 

 the sheath being provided with some horny spines of unequal size. 

 Maxillae flat ; the outer margins of both together form a card- like 

 figure ; their lower extremity is hairy ; sternal lip between the 

 maxillse, elongate-elliptical. Sternum ovate, covered with rather 

 coarse hairs. Palpi of moderate length ; the terminal joint is 

 rather longer than the two preceding together, and armed with 

 a minute non-pectinated claw. 



Legs rather robust, tapering, very unequal in length, the two 

 anterior being nearly equally long, but much longer than the 

 two posterior ; the fourth is longer than the third ; each is 

 armed with a pair of minute claws. 



Abdomen club-shaped, anteriorly produced into a very long, 

 thin, cylindrical process, which is twice bent, so that its basal 

 half is leaning backwards on the back of the abdomen, whilst its 

 terminal half is directed upwards and forwards, terminating in 

 a slight cuneiform swelling; this singular appendage is covered 

 with a leathery, fine hairy skin, like the lower parts of the 

 abdomen. The cephalothorax being united with the abdomen 

 at no great distance from the spinners, the anterior portion of 

 the abdomen, with its appendage, is situated vertically above the 

 thorax. The abdomen is nearly smooth above, and covered with 

 very fine hairs below ; it terminates in an obtuse point directed 

 upwards. 



Six spinners in a quadrangular group immediately before the 

 vent; the anterior and posterior pair are of moderate size; the third 

 pair is very short, and situated between the posterior spinners. 



Two branchial opercula ; tracheal opercula absent. 



Dimensions. lines. 



Length of cephalothorax 4 



abdomen to the first bend of the appendage 12 



appendage from its first bend 10 



falces 1^ 



palpus 4J 



terminal joint of palpus 1| 



first leg 16 



second leg 1 6 J 



third leg 9 



fourth leg 10| 



Colour brownish yellow; extremities of the legs and of abdo- 

 minal appendage and sternum blackish brown ; upper parts of the 

 abdomen yellow ; two black bands round the femur of the first leg. 



A single female specimen of this spider was obtained by the 

 late M. Mouhot in the Lao Mountains of Cochin China.* Its 

 form is so extraordinary, that we have not hesitated to refer it to 

 a new genus, Cyphagoyus. 



