SCUTELLIDIUM. 1 79 



foot-jaw (fig. 4) slender, 2-jointed, the last joint bear- 

 ing a long, closely pectinated, apical spine and one seta, 

 which is also pectinate or plumose. Posterior foot-jaw 

 (fig. 5) short and robust, the hand irregularly quadrate, 

 and terminating in a short crooked claw. The first pair 

 of feet lie in close apposition, and, like the following 

 pairs, cross each other near the extremities when at rest; 

 they do not differ materially from the same structures 

 in 8. tisboides ; the last two joints of the inner branch 

 of the first foot are, however, very small, and the last 

 joint of the outer branch (fig. 6) bears on the outer 

 margin five curved spines, and at the apex a strongly 

 curved seta. The second pair, as in S. tisboides, is 

 almost spineless, but the third and fourth have mar- 

 ginal spines, and the two distal joints of the outer 

 branches (fig. 7), besides having densely setose mar- 

 gins, have also curved rows of short spine-like hairs 

 scattered over the surface. Fifth pair elongated, 2- 

 jointed (fig. 8), the first joint larger than the second, 

 both having ciliated outer margins; the first also 

 a seta at each distal angle ; the second three long and 

 two smaller setae. In the male the fifth foot is some- 

 what similar (fig. 9), but very much smaller than in 

 the other sex, reaching only to the extremity of the 

 firsk abdominal ring, while in the female (fig. 1) it ex- 

 tends almost to the base of the caudal segments. Last 

 thoracic segment, in both sexes, very small (fig. 9) ; 

 the first abdominal segment in the female very much 

 larger than the following ones ; in the male (fig. 9) 

 all five segments are distinct and except the first, 

 which is longer than the rest nearly of equal width 



