PALAMX/EUS. 



85 



a 2 . Humerus of chela coarsely granular on the 



underside at base ; 5th caudal segment [p. 86. 



not shorter than carapace P. sicammerdami, 



V. Humerus smooth below, or with only a few 

 granules ; 5th caudal segment much 

 shorter than carapace. 

 a 3 . Tarsal lobes armed each with 3 spines, 1 [p. 90. 



at the apex above and 2 below P. latimanus, 



b 3 . Tarsal lobes armed with 2 spines each, the 



apex not spined, tipped with bristles. 

 a 4 . Lower side of vesicle perfectly smooth 



and polished, hairy and punctured . . P. liurus, p. 91. 

 b l . Vesicle furnished below with at least 



four rows of sharp tubercles. 

 a s . Inner edge of hand not beset with 

 sharp tooth-like tubercles, crested 

 at base of finger ; upper surface with [p. 90. 



four low longitudinal crests P. gravimanus, 



V>. Inner edge of hand studded with 

 sharp denticles, not crested at base 

 of finger; tubercles of the dorsal 

 side not running into four distinct 

 longitudinal crests. 



a". Outer portion of upper surface of 

 hand defined above by a distinct 

 but irregular ridge or erest. 



a 7 . Legs reddish yellow P. fulvipes, p. 87. 



b~. Legs deep blackish brown .... P. wroughtoni, 

 b*. Outer portion of upper side of hand [p. 89. 



not defined above by a longitudinal 

 ridge. 

 ". Length of adult only about 



75 mm. ; legs reddish yellow as [p. 92. 



in fulvipes P, xanthopus, 



b*. Length of adult not less than 

 100 mm. ; legs coloured like 

 trunk, generally nearly black. 

 9 . Hand exceedingly smooth 

 above ; terga with three pos- 

 terior tubercles P. scaber, p. 93. 



A 91 . Hand rugose or tubercular ; 



terga not tubercular. 

 10 . Hands orange-yellow ; rest 



of chelae, body and legs black. P. barberi, p. 95. 

 b 10 . Hands much "the same colour 



as rest of chelae 

 a 11 . Hands narrow, smooth, 



covered above with sculp- [p. 94. 



turing of reticulated ridges. P. benyaletisis, 

 i 11 . Hands broad, covered above 

 with large tubercles or 

 coarsely reticulated. 

 a 1 ' 2 . Last abdominal sternum 

 without four low crests, 

 densely punctured; basal 

 portion of pecten broad, 

 its angle le.s obtuse .... P. pJiipsoni, p. 94. 



