scoupiops. 65 



Synopsis of Indian Species. 



Brachium of chela armed at base in front with 



a pair of small tubercles. 

 a . Upper and posterior crests upon the hand 

 and brachium very strong and smooth. 

 a 2 . Upper surface of hand without a smooth 

 crest lying longitudinally between the 

 finger-keel and the inner border and 

 ornamented with granules which fre- 

 quently run together into ridges ; length 

 of underhand exceeding width of hand, 

 especially in J , in which the chelae are 



elongate S. hardwickii, p. 6( i 



ft 2 . Upper surface of hand with a smooth 

 longitudinal crest between the iinger- 

 keel and the inner border and ornamented 

 with a coarse network of perfectly 

 smooth ridges resulting from the anas- 

 tomosis of low tubercles ; width of hand 

 exceeding length of underhand, espe- 

 cially in c?, in which the chela: are not 



elongate , S. imculptus, p. 68. 



b l . Upper and posterior crests upon hand and 



brachium distinctly, often coarsely granular. 



a 3 . Length of underhand in 2 about equal 



to width of hand ; keel forming inner 



edge of upper surface of hand projecting 



so as to conceal upper crest on inner 



surface of hand S. crassimanus, p. 68. 



b 3 . Length of underhand in both sexes much 

 greater than width of hand ; crest 

 forming inner edge of upper surface 

 weak and not projecting so as to conceal 



upper crest on inner surface of hand . . S. leptochirm, p. 69. 



Brachium of chela armed in front at base with 



one or more, usually two, long sharp spini- 



form tubercles. 



a*. Tail almost four times ( 5 ) or morn than 



four times (J 1 ) as long as the carapace; 



superior keels of segments 2 1 posteriorly 



depressed, not spiniform ; brachial pores 7; 



vesicle, especially in 3 , large S. petersii, p. 70. 



b*. Tail shorter: superior keels of segments 

 •_' t or 3-4 posteriorly spiniform and, ex- 

 cept in S. astkenuru8, elevated: vesicle 

 smaller; brachial pores not fewer than it. 

 a s . Aculeus not defined at the base on each 

 side by a semicircular groove ; tail short 

 ami slender, with strongly spiniform 

 superior keels; bands and carapace 

 flatter: width of area on hand between 

 finger-keel and inner edge not less in 

 adult 2 t° an half the movable finger . . s. montanus, p. 70. 



