BY DE. K. JORDAN AND HON. N. CHARLES ROTHCHILD. 29l 



cf. Eighth abdominal sternite (fig. 6) ventrally below 

 the ninth sternite with a ppinose process, which is much 

 shorter than in St. rohinsoni ; no other species besides these 

 two is known to 

 have a similar pro- 

 cess. Exopodite F 

 more strongly 

 curved, the neck 

 narrower, the apical 

 portion larger, a 



ventral row of three ^^ j_ 



large bristles close ** Jf\\ \\^ -AX 



to apex, proximally ~S~~V ' % y^l 



to this row one or _.^^^^^::>^\^Vv.____-JK' ^^ 



no ventral bristle, C\^ \/^ / ] f ^ 



near the margin of //X V / ^ -'^^ 



the eighth sternite A V /{"■■■'^"■■-/■■/../ 



two slender ventral / \ y \ y/f'kv^ 



bristles. 



Ventral arm of 

 ninth sternite (ix. 

 st.) with a very 

 short, apical, tooth- 

 like, upward pro- 

 jection ; at ventral 

 margin near apex a 

 row of five short 

 blunt spines and 

 proximally to this 

 row three small 

 bristles and two 

 heavier spiniform 

 ones; above these 

 ventral bristles a 



broad lateral flap on the outer surface, bearing a row of small 

 bristles which point downward (probably laterad in life) ; 

 above this lobe the segment convex, bearing on the inner side 

 at the dorsal margin a patch of small bristles. The armature 

 of the ejaculatory duct differs from that of Si. rohinsoni, 

 particularly in the ventral apical scierite being longer, 

 acuminate, finger-like. 



