THE AFGHAN DELIMITATION COMMISSION. 115 



surface less deeply excavated than in the second segment, and the intercarinal spaces very 

 finely and sparsely granular. The fourth segment differs from the third almost as the 

 third does from the second and the second from the first. The fifth segment not exca- 

 vated ahove ; lateral margins of upper surface irregularly granular, or finely and bluntly 

 denticulated in front, the granules or denticles becoming smaller behind and disappearing 

 before reaching the posterior angle of the upper surface of the segment ; lateral surface 

 very finely and sparsely granular. The denticles of the inferior lateral keels small, but 

 larger than those of any other keel in the tail ; the denticles are blunt, vary slightly in 

 size, and increase gradually in size from before backwards. The keels gently curved, the 

 distance between them in front equal to the distance between them behind ; but they are 

 more widely separated in the middle of the segment. The inferior surface is divided by 

 a complete, median, finely, bluntly, and evenly denticulated keel, between which and the 

 lateral keels are some very fine granules and a few small tubercles. The posterior border 

 of this surface finely and bluntly denticulated, the posterior lateral lobe of this segment 

 undivided, but slightly roughened beneath. Vesicle oval, slender, only as wide as the 

 distance between the posterior ends of the inferior lateral keels of the fifth segment of 

 the tail ; much narrower than the middle of the segment ; granular beneath. Aculeus 

 long, slender, gently curved ; vesicle and aculeus equal in length, together as long as the 

 fifth caudal segment. 



Chela— -Upper surface of humerus very finely granular, bounded in front and behind 

 by a series of blunt denticles ; anterior surface bounded below by a series of denticles, 

 and divided into an upper smooth, and a lower finely granular area, by a row of widely 

 separated larger denticles, between which are smaller granules. Inferior and posterior 

 surfaces finely granular, but not sharply separated froi~ each other. Upper surface of 

 brachium furnished with two granular keels ; the anterior surface also has two granular 

 keels ; at the proximal end of each keel is a larger denticle ; the inferior surface also has 

 two granular or merely roughened keels ; the posterior surface is smoothly costate, and 

 all the intercarinal spaces of the segment are smooth. Manus rounded, smooth, wide, 

 considerably wider than brachium ; length of the " hand-back " greater than width 

 of the hand. Dactyli long, slender, gently curved ; the movable dactylus furnished 

 proximally with a conspicuous lobe, which fits into a corresponding excavation in the 

 immovable dactylus. Length of the "hand-back" equal to half the length of the 

 movable dactylus. 



Legs. — External surfaces furnished with granular keels ; internal surfaces smooth. 

 Three distal segments hairy ; margins of coxal segments finely granular. 



Fectines not projecting beyond the distal margins of tbe posterior coxae ; number of 

 teeth 22 and 23. 



Measurements (in millimetres) : — 



Length. Breadth. Height. 



Total 71 



Cephalothorax 8| 9 



Tail 44| 



First caudal segment 5 5 4«J 



