Two additional South-African Phyllopoda. 7 



however, much shorter and thicker than in S. gracilis, and 

 when fully extended, but slightly exceed the head in length. 

 As in other species, 3 chief parts may be distinguished, 

 viz., the basal segment, the median, flexible part, and the 

 terminal chela (see fig. 7). The basal segment is rather 

 thick and muscular, and is densely clothed in front with 

 delicate sensory hairs. At the end it is produced to a long 

 and slender, claw-like process pointing obliquely inwards, 

 and meeting the corresponding projection of the other 

 side. The median, flexible part, which in S. gracilis is of 

 quite an extraordinary length, and is genicularly bent in the 

 middle, does not in this species exceed the length of the 

 basal segment. It is evenly curved and provided with 

 numerous transverse folds, which in front are clothed with 

 delicate sensory hairs; but no tentacular papillæ are found 

 on this part analogous to those occurring in S. gracilis 

 beyond the genicular flexure. The terminal chela is rather 

 large and very distinctly defined at the base. It has the 

 edges perfectly smooth, and is produced at the end into 2 

 slender digitiform processes of rather unequal length, the 

 anterior one being almost twice as long as the posterior 

 and terminating in a very slender point. Both processes 

 are quite simple, somewhat distant at the base, and curved 

 in a sigmoid manner. Between them a small conical promi- 

 nence is seen projecting from the palm. 



The oral parts do not differ in their structure from 

 those in S. gracilis. 



The branchial legs (figs. 8—10), on the other hand, 

 though constructed upon the same type as in that species, 

 exhibit some well-marked differences in their details. For 

 instance, the basal plate, which in S. gracilis is quite smooth, 

 in the present species has the edges distinctly serrate, and 



