64 On a new Crab from Basra. 
and more closely set, but there is no definite group of en- 
larged granules as in the male of S. dehaani. ‘The convex 
lower margin of the palm becomes gently concave in passing 
into the lower margin of the immovable finger, The granules 
forming a row on the inner surface of the palm are large. 
The upper edge of the immovable finger is distinctly concave 
and the fingers gape when closed. The dactylus: has on its 
upper surface a row—or, rather, a narrow central band—of 
tubercles which show a tendency to break up into obliquely 
transverse groups. In S. dehaant the lower margin of the 
palm passes in a straight line, or with only a very slight con- 
cavity, into the lower margin of the immovable finger, and 
the upper edge of the latter is straight or slightly convex ; 
the fingers meet when closed, and the immovable finger in 
both sexes is much more broadly triangular than in the new 
species. The walking-legs are conspicuously less hairy than 
in S. dehaant, the longer hairs being less numerous and always’ 
shorter than the width of the segments. The meropo.lites 
are, as a rule, less broad than in S. dehaani. 
he penultimate segment of the abdomen of the male is 
distinctly more than twice as broad at its anterior or proximal 
margin as it is long. 
Localities. Ashar Creek, Basra ; 2 $ (including holotype), 
2 2, collected by Capt. C. L. Boulenger. 
Basra; 1 ¢,1 2, collected by L. HE. Adams, B.M. Reg. 
83. 23 (determined by EK. J. Miers as S, dehaant). 
Measurements of 8. boulengeri and 8. dehaani. 
: weve 7 Ratio of length 
‘carapace ‘width to, °famerapotis of 
sak wie Feast 1, to width = ig 
S. boulengert : 
SS MBS IED. Ta, ai 230 1:108 1:85. 
: 21°75 1183 172 
Boulenger ..8%..% dS, holetype. 25°0 1°119 1-90 
Ge 17:75 1154 L741 
2. 22°5 1133 17, 
ey 19°%5 1:192 1:69 
S. dehaant : 
54.10,North China. 9. 21°5 1104 1:89 
3. 21:5 1-081 2°15 
Gs 23°0 1:108 2°21 
61.44, Hong Kong. ¢. 10-5 1:238 2-04 
do. 22°5 1-088 ag Ta 
753, Japan ..ss0+ > 27°75 1:045 232 
Remarks.—The presence of a distinct tooth at the inner 
angle of the carpus of the chelipeds brings this species, 
