314 ME. E, I. POCOCK ON SCOEPIONS 



Pectines projecting beyond tlie apex of the 4th coxae, furnished 

 with 29-30 teeth ; the basal lobe large and long. 



Measurements in millimetres. — Total length 66, of carapace 7'5j 

 of tail 41 ; width of 1st segment 5'5, of 4th 6"3, length of latter 7, 

 height 5 ; length of 5th 7*6, height 4, width 5*5 ; length of manus 

 and digits 10*5, of movable digit 6"6. 



Loc. Mombasa (2 specimens). 



This ppecies differs markedly from liosoma and its allies in the 

 uniform colouring of the tail, as well as in having the segments 

 of this organ much more elevated.] 



Nakobuthus, gen. nov. 



Movable jaw of mandible armed below with one small tooth 

 behind the terminal fang; immovable jaw unarmed below. 



Digits of the chelae with their proximal third unarmed ; thfe 

 distal portion armed with only 5 median rows of minute denticles 

 accompanied by short oblique rows, each composed of 3 (2) excep- 

 tionally strong sharp conical teeth, the apex of the digits being 

 occupied by 6 of these large teeth. 



G-enital operculum very large and long, each half about twice 

 as long as wide, with strongly convex posterior border and emar- 

 ginate external border, more than twice as long as the triangular 

 deeply impressed sternum. 



JSTanobuthus Andeesoni, n. sp. 



Colour. Trunk infuscate above, the posterior and lateral 

 borders of the terga ferruginous ; palpi, legs, and tail pale yellow, 

 the latter organ very slightly infuscate at its base ; its 5th seg- 

 ment also lightly infuscate below ; the lower surface of the trunk 

 pale olivaceous ; pectines yellow. 



Carapace about as long as the 1st caudal segment and half the 

 2nd, granular throughout ; median eyes widely separated ; keels 

 almost entirely obsolete, the anterior and posterior median alone 

 represented by a few larger more polished granules. Terga 

 granular throughout ; the lateral keels very weak ; the two lateral 

 keels on the 7th also very weak. Sterna smooth, the last 

 weakly granular posteriorly ; the 4 keels, especially the external 

 ones, very poorly developed. 



Tail narrowed behind, about h\ times the length of the cara- 

 pace ; the superior keels weak on the 1st segment and practically 

 absent on the rest, the upper edges being evenly rounded ; the 

 upper surface excavated on the 1st, 2nd, and 3rd, the 4th and 



