CH.EEILUS. 



59 



hand, both of which are thus much longer than carapace ; hand 

 (fig. 17, C) long and narrow, the width considerably less than half 

 the length of the underhand, its inner edge straight and parallel 

 with the outer edge ; movable finger a little longer than the 

 carapace. Pectinul teetli 6. 



Measurements in mm. Total length 64, carapace 9, tail 39, 

 brachium 10'5, underhand 11, movable finger 9'5, width of hand 4*5. 



Loc. Ladakh. 



45 Chaerilus tricostatus, Pocock, Jour. Bom. N. H. Soc. xii, p. 26(>. 



1899. 



Colour (dry specimen) a tolerably uniform reddish brown, with 

 blacker markings. Carapace granular at the sides, mostly smooth 

 above except for the anteocular triangle, which is granular at 



C. 



Fig. 17. A. Hand of Chcerilm tricostatus^. B. Hand of C. f ictus <$ . 

 C. Hand of C. insignis J. 



least in front; longer than 1st and 2nd caudal segments, about 

 equal to 3rd and 4th and a little longer than oth. Sterna as in 

 the other species, but the last furnished with four short crests, 

 each consisting of a few large granules. Terga finely granular, 

 with a few larger pearl-like granules scattered here and there, and 

 a series of them along the posterior border ; with distinct lateral 

 crests, those on the 3rd consisting of a single large pearl-like 

 granule, those on the 4th, 5th, and 6th of three similar granules. 

 Tail rather less than three times the length of the carapace, width 

 of 1st segment about equal to length of 4th ; 2nd about as wide 

 as long ; dorsal surface very sparsely granular, lateral and inferior 

 surfaces weakly but not so sparsely granular as the upper surface : 

 all the keels normal and denticulated ; the inferior median keels of 

 the 1st segment distinct and consisting of coarse granules like those 

 on the 2nd and on the last abdominal sternum ; vesicle finely granular 

 below and laterally, of much the same form as in C. margaritatus and 

 C. insignis. Chetaf long ; humerus as long as carapace and a little 



