82 Mr. R. I. Pocock on 



ChcBrilus insigniSj sp. n. 



Colour (dry specimen) for the most part ferruginous, tlie 

 keels black. 



Carapace finely granular in front and at the sides ; ocular 

 tubercle elongate in front, smooth, depressed above, distance 

 between the eyes distinctly greater than a diameter. 



Tergites very finely granular ; with scarcely a trace of a 

 median keel, and the lateral keels represented by low smooth 

 tubercles. 



Sternites smooth. 



Tail more than four times the length of the carapace, which 

 is equal to the first, second, and one fourth of the third of its 

 segments, the first segment much wider than long, the second 

 longer than wide, the segments becoming progressively longer 

 and wider posteriorly and from the second to the fifth ; the first 

 segment with ]0 keels, of which the inferior median are 

 smooth, the second to fourth with 8 keels, with a trace of the 

 median lateral posteriorly ; all the keels distinctly granular, 

 the superior being even denticulate ; the fifth segment longer 

 than tlie carapace, its upper surface flat behind and smooth, 

 normally keeled and denticulate ; all the intercarinal spaces 

 of the tail are at most weakly granular ; vesicle large, l>yri- 

 form, as wide as the fourth segment, smooth above and neaily 

 smooth below, weakly granular laterally, shaped almost as in 

 C. margaritatus, but with the vesicle not so thick at the 

 base. 



Paljri yery long; humerus entirely covered with granules 

 above and in frunt, and nearly as granular below, much 

 smoother behind ; hrachium thickly and coarsely granular on 

 the keels, the intercarinal spaces less coarsely granular, armed 

 with a few denticles in front ; humerus and brachium more 

 than twice as long as wide : manus long, narrow, parallel-sided, 

 furnished with 7 very distinct keels, the posterior lobe not 

 large; the whole of the upper and outer surfaces granular, 

 the granules coarser upon the keels, tiie inner surface of the 

 hand weakly granular, the keel also weak, the digits coarsely 

 granular; the immovable digit subcarinate above, with 10-11 

 rows of teeth ; the movable digit shorter than the length of the 

 hand-back, e({ualliiig the eighth caudal segment in length. 



Legs iinely granular externally, their fifth segment much 

 shorter than the sixth. 



Pectines large, furnished with 6 long teeth. 

 Measurements in inillimctres. — Total length G4, of cara- 

 pace 9, of tail almost 40 ; length of humerus 9'0, of brachium 



