62 CH-EBILID^E. 



carapace ; hand (tig. 17, B) a little longer than in female, its width 

 about four-fifths its length. 



Measurements in mm. — $ (young). Total length 32, carapace 5, 

 tail 20, brachium 4, underhand 3'S, movable finger 4, width of 

 hand 3-3. 



<5 (adult). Total length 61, carapace 6*5, tail 41, brachium 5-5, 

 underhand 5-8, movable linger 5, width of hand 4'5. 



Loc. Sylhet (Stainsforth). 



The male of this species differs strikingly from that of all the 

 others in the peculiar form of the vesicle and the great length of 

 the tail. 



48. Chserilus ceylonensis, Powck. A.M. N.H. (6) xiii, p. 83 (1894)i 

 Kraep. Tierr., Scorp. p. 159 (1899). 



S . Colour dull brown ; ocular tubercle, crests of hand, and digits 

 infuscate. Carapace longer thau 1st and 2nd caudal segments, as 

 long as 3rd and 4th, longer than 5th, granular throughout, with 

 the exception of the grooves, which are smooth ; ocular tubercle 

 granular. Terga granular throughout, not or hardly distinctly 

 crested. Teiil about four times as long as carapace, finely granular ; 

 2nd segment as long as wide, 5th more than twice as long as wide ; 

 inferior median keel nearly obsolete on 1st segment ; median 

 lateral keel distinct on 1st, represented by a few larger granules 

 on the others, extending over half the lateral surface of the 5th : 

 the rest of the keels distinct and granular ; vesicle of approximately 

 the same form as in C. margdritatus, wider and higher than 5th seg- 

 ment ; coriaceous below, but not visibly granular. Chelce : humerus 

 aud brachium much shorter than carapace, humerus coarsely granular 

 above and in front, brachium granular above, almost smooth behind 

 and below ; band covered with reticulation of fine granules, keels 

 and base of digits thickly aud very finely granular ; keels normal 

 in number, but low and very weakly granular ; hand nearly 

 parallel-sided ; length of underhand greater than width of hand 

 and greater than length of movable digit, which is a little shorter 

 than width of hand; immovable digit furnished with 11- 12 rows 

 of teeth, its basal width equal to two-thirds its length. Pectinal 

 teeth 5-6. 



Measurements in mm. — Total length 44, carapace 5*5, tail 22, 

 brachium 4, underhand 5*5, movable finger 4, width of hand 4 - 5. 



Lot: Trincomali, Ceylon (Barrett). 



The two following species have been omitted from the synoptical 

 table, since I have had no opportunity of examining actual 

 specimens. 



i ( .t. Chserilus birmanicus, ThoreU, Ann. 31w<. Genova, xw ii, p. 584. 

 18s:i (Chelomachus). 



Colour subtestaceous, varied with black. Carapace tolerably 



