C4 On a new Crah from Baara. 



and more closely set, but there is no definite group of en- 

 lar^od granules as in the male o£ S. dehaani. The convex 

 lower margin of the palin becomes gently concave in passing 

 into the lower margin of the immovable finger. Tlie granules 

 forming a row on the inner surface of the palm are large. 

 Tlie upper edge of the immovable finger is distinctly concave 

 and the fingers gape when closed. The dactylus has on its 

 upi)er surface a row — or, ratiier, a narrow central band — of 

 tubercles which show a tendency to break up into obliquely 

 transverse groups. In S. dehaani 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 up[)er 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. Tlie walking-legs are conspicuously less hairy than 

 in S. dehaani, the longer hairs being less numerous and always 

 shorter than the width o£ the segments. The meropoditcs 

 are, as a rule, less broad than in "S. dehaani. 



Tlie penultimate segment of the abilomen of the mule is 

 distinctly more than twice as broad at its anterior or proximal 

 margin as it is long. 



Localities. Ashar Creek, Basra ; 2 c? (including holotype), 

 2 ? , collected by Cai)t. (J. L. 13oulenger. 



Basra; 1 c? , 1 ? , collected by L. E. Adams, B.il. lleg. 

 83. 23 ((letermiued by E. J. Miers as «S. dehaani). 



Measurements of iS. boulengeri a7id S. dehaani. 



Ratio i>f 1, ,• , , ., 



cnra,moe width to "f "«'r»l..Hl,tt. uf 



iu mm. lenylh of l'^'»"'"""'t" ^K 



carairttcc = l. to width = 1. 



S. houhiKferi : 



83. 23 d . l.'3-O 1-108 l-8o 



y. 'Jl-7o 1183 1-72 



lioulonger c5', holotype, 23-0 MIO M)! 



J. 17-75 1-154 1-71 



5. 22-6 1133 1-7 



$. 19-5 1-192 1-G9 



8. dehaani : 



54. 10, North China. $. 21-5 1-104 1-89 



S. 21-6 1-081 2-15 



cf. 23-0 1-108 2-21 



61.44, Hong Kong, d- K^'S 1-238 204 



J. 22-5 1-088 2-11 



753, Japan d • 27-76 1 045 232 



Remarks. — Tlio presence of a ilistinct tooth at the inner 

 angle of the carpus uf the chelipeds brings this s[)ecies, 



